diff --git a/composer.lock b/composer.lock
index cc7abfc24..d1374b83d 100644
--- a/composer.lock
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+        {
+            "name": "symfony/polyfill-php56",
+            "version": "v1.12.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/polyfill-php56.git",
+                "reference": "0e3b212e96a51338639d8ce175c046d7729c3403"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/polyfill-php56/zipball/0e3b212e96a51338639d8ce175c046d7729c3403",
+                "reference": "0e3b212e96a51338639d8ce175c046d7729c3403",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3",
+                "symfony/polyfill-util": "~1.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.12-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Polyfill\\Php56\\": ""
+                },
+                "files": [
+                    "bootstrap.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony polyfill backporting some PHP 5.6+ features to lower PHP versions",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "compatibility",
+                "polyfill",
+                "portable",
+                "shim"
+            ],
+            "time": "2019-08-06T08:03:45+00:00"
+        },
         {
             "name": "symfony/polyfill-php70",
             "version": "v1.12.0",
@@ -1851,17 +1908,69 @@
             "time": "2019-08-06T08:03:45+00:00"
         },
         {
-            "name": "symfony/routing",
-            "version": "v3.4.30",
+            "name": "symfony/polyfill-util",
+            "version": "v1.12.0",
             "source": {
                 "type": "git",
-                "url": "https://github.com/symfony/routing.git",
-                "reference": "8d804d8a65a26dc9de1aaf2ff3a421e581d050e6"
+                "url": "https://github.com/symfony/polyfill-util.git",
+                "reference": "4317de1386717b4c22caed7725350a8887ab205c"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/routing/zipball/8d804d8a65a26dc9de1aaf2ff3a421e581d050e6",
-                "reference": "8d804d8a65a26dc9de1aaf2ff3a421e581d050e6",
+                "url": "https://api.github.com/repos/symfony/polyfill-util/zipball/4317de1386717b4c22caed7725350a8887ab205c",
+                "reference": "4317de1386717b4c22caed7725350a8887ab205c",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.12-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Polyfill\\Util\\": ""
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony utilities for portability of PHP codes",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "compat",
+                "compatibility",
+                "polyfill",
+                "shim"
+            ],
+            "time": "2019-08-06T08:03:45+00:00"
+        },
+        {
+            "name": "symfony/routing",
+            "version": "v3.4.35",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/routing.git",
+                "reference": "afc10b9c6b5196e0fecbc3bd373c7b4482e5b6b5"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/routing/zipball/afc10b9c6b5196e0fecbc3bd373c7b4482e5b6b5",
+                "reference": "afc10b9c6b5196e0fecbc3bd373c7b4482e5b6b5",
                 "shasum": ""
             },
             "require": {
@@ -1924,37 +2033,38 @@
                 "uri",
                 "url"
             ],
-            "time": "2019-06-26T11:14:13+00:00"
+            "time": "2019-11-08T17:25:00+00:00"
         },
         {
             "name": "symfony/twig-bridge",
-            "version": "v3.4.30",
+            "version": "v3.4.35",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/twig-bridge.git",
-                "reference": "bf136ba1fbd18126ab65a930ea0daebb0b0fd159"
+                "reference": "a2fa4d04a4f22c8abf7d12188d89510e2e9bd1c1"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/twig-bridge/zipball/bf136ba1fbd18126ab65a930ea0daebb0b0fd159",
-                "reference": "bf136ba1fbd18126ab65a930ea0daebb0b0fd159",
+                "url": "https://api.github.com/repos/symfony/twig-bridge/zipball/a2fa4d04a4f22c8abf7d12188d89510e2e9bd1c1",
+                "reference": "a2fa4d04a4f22c8abf7d12188d89510e2e9bd1c1",
                 "shasum": ""
             },
             "require": {
                 "php": "^5.5.9|>=7.0.8",
-                "twig/twig": "^1.40|^2.9"
+                "twig/twig": "^1.41|^2.10"
             },
             "conflict": {
                 "symfony/console": "<3.4",
-                "symfony/form": "<3.4.13|>=4.0,<4.0.13|>=4.1,<4.1.2"
+                "symfony/form": "<3.4.31|>=4.0,<4.3.4"
             },
             "require-dev": {
+                "fig/link-util": "^1.0",
                 "symfony/asset": "~2.8|~3.0|~4.0",
                 "symfony/console": "~3.4|~4.0",
                 "symfony/dependency-injection": "~2.8|~3.0|~4.0",
                 "symfony/expression-language": "~2.8|~3.0|~4.0",
                 "symfony/finder": "~2.8|~3.0|~4.0",
-                "symfony/form": "^3.4.23|^4.2.4",
+                "symfony/form": "^3.4.31|^4.3.4",
                 "symfony/http-foundation": "^3.3.11|~4.0",
                 "symfony/http-kernel": "~3.2|~4.0",
                 "symfony/polyfill-intl-icu": "~1.0",
@@ -2014,20 +2124,20 @@
             ],
             "description": "Symfony Twig Bridge",
             "homepage": "https://symfony.com",
-            "time": "2019-07-24T19:39:07+00:00"
+            "time": "2019-10-24T15:33:53+00:00"
         },
         {
             "name": "symfony/twig-bundle",
-            "version": "v3.4.30",
+            "version": "v3.4.35",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/twig-bundle.git",
-                "reference": "fae76fd8d8cff50295282d752e9842324bd277e4"
+                "reference": "d39ed8f5df62aeeeb27a6f3bf7f58a6c02a58ea9"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/twig-bundle/zipball/fae76fd8d8cff50295282d752e9842324bd277e4",
-                "reference": "fae76fd8d8cff50295282d752e9842324bd277e4",
+                "url": "https://api.github.com/repos/symfony/twig-bundle/zipball/d39ed8f5df62aeeeb27a6f3bf7f58a6c02a58ea9",
+                "reference": "d39ed8f5df62aeeeb27a6f3bf7f58a6c02a58ea9",
                 "shasum": ""
             },
             "require": {
@@ -2038,14 +2148,14 @@
                 "symfony/http-kernel": "^3.3|~4.0",
                 "symfony/polyfill-ctype": "~1.8",
                 "symfony/twig-bridge": "^3.4.3|^4.0.3",
-                "twig/twig": "~1.40|~2.9"
+                "twig/twig": "~1.41|~2.10"
             },
             "conflict": {
                 "symfony/dependency-injection": "<3.4",
                 "symfony/event-dispatcher": "<3.3.1"
             },
             "require-dev": {
-                "doctrine/annotations": "~1.0",
+                "doctrine/annotations": "~1.7",
                 "doctrine/cache": "~1.0",
                 "symfony/asset": "~2.8|~3.0|~4.0",
                 "symfony/dependency-injection": "~3.4.24|^4.2.5",
@@ -2089,20 +2199,20 @@
             ],
             "description": "Symfony TwigBundle",
             "homepage": "https://symfony.com",
-            "time": "2019-07-19T08:16:37+00:00"
+            "time": "2019-10-01T15:13:36+00:00"
         },
         {
             "name": "symfony/yaml",
-            "version": "v3.4.30",
+            "version": "v3.4.35",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/yaml.git",
-                "reference": "051d045c684148060ebfc9affb7e3f5e0899d40b"
+                "reference": "dab657db15207879217fc81df4f875947bf68804"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/yaml/zipball/051d045c684148060ebfc9affb7e3f5e0899d40b",
-                "reference": "051d045c684148060ebfc9affb7e3f5e0899d40b",
+                "url": "https://api.github.com/repos/symfony/yaml/zipball/dab657db15207879217fc81df4f875947bf68804",
+                "reference": "dab657db15207879217fc81df4f875947bf68804",
                 "shasum": ""
             },
             "require": {
@@ -2148,30 +2258,30 @@
             ],
             "description": "Symfony Yaml Component",
             "homepage": "https://symfony.com",
-            "time": "2019-07-24T13:01:31+00:00"
+            "time": "2019-10-24T15:33:53+00:00"
         },
         {
             "name": "twig/twig",
-            "version": "v1.42.2",
+            "version": "v1.42.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/twigphp/Twig.git",
-                "reference": "21707d6ebd05476854805e4f91b836531941bcd4"
+                "reference": "e587180584c3d2d6cb864a0454e777bb6dcb6152"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/twigphp/Twig/zipball/21707d6ebd05476854805e4f91b836531941bcd4",
-                "reference": "21707d6ebd05476854805e4f91b836531941bcd4",
+                "url": "https://api.github.com/repos/twigphp/Twig/zipball/e587180584c3d2d6cb864a0454e777bb6dcb6152",
+                "reference": "e587180584c3d2d6cb864a0454e777bb6dcb6152",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.4.0",
+                "php": ">=5.5.0",
                 "symfony/polyfill-ctype": "^1.8"
             },
             "require-dev": {
                 "psr/container": "^1.0",
-                "symfony/debug": "^2.7",
-                "symfony/phpunit-bridge": "^3.4.19|^4.1.8|^5.0"
+                "symfony/debug": "^3.4|^4.2",
+                "symfony/phpunit-bridge": "^4.4@dev|^5.0"
             },
             "type": "library",
             "extra": {
@@ -2194,19 +2304,19 @@
             "authors": [
                 {
                     "name": "Fabien Potencier",
-                    "role": "Lead Developer",
                     "email": "fabien@symfony.com",
-                    "homepage": "http://fabien.potencier.org"
-                },
-                {
-                    "name": "Armin Ronacher",
-                    "role": "Project Founder",
-                    "email": "armin.ronacher@active-4.com"
+                    "homepage": "http://fabien.potencier.org",
+                    "role": "Lead Developer"
                 },
                 {
                     "name": "Twig Team",
-                    "role": "Contributors",
-                    "homepage": "https://twig.symfony.com/contributors"
+                    "homepage": "https://twig.symfony.com/contributors",
+                    "role": "Contributors"
+                },
+                {
+                    "name": "Armin Ronacher",
+                    "email": "armin.ronacher@active-4.com",
+                    "role": "Project Founder"
                 }
             ],
             "description": "Twig, the flexible, fast, and secure template language for PHP",
@@ -2214,22 +2324,22 @@
             "keywords": [
                 "templating"
             ],
-            "time": "2019-06-18T15:35:16+00:00"
+            "time": "2019-11-11T16:49:32+00:00"
         }
     ],
     "packages-dev": [
         {
             "name": "symfony/stopwatch",
-            "version": "v3.4.30",
+            "version": "v3.4.35",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/stopwatch.git",
-                "reference": "2a651c2645c10bbedd21170771f122d935e0dd58"
+                "reference": "efe0af281ad336bc3b10375c88b117499f1d8494"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/stopwatch/zipball/2a651c2645c10bbedd21170771f122d935e0dd58",
-                "reference": "2a651c2645c10bbedd21170771f122d935e0dd58",
+                "url": "https://api.github.com/repos/symfony/stopwatch/zipball/efe0af281ad336bc3b10375c88b117499f1d8494",
+                "reference": "efe0af281ad336bc3b10375c88b117499f1d8494",
                 "shasum": ""
             },
             "require": {
@@ -2265,20 +2375,20 @@
             ],
             "description": "Symfony Stopwatch Component",
             "homepage": "https://symfony.com",
-            "time": "2019-01-16T09:39:14+00:00"
+            "time": "2019-11-03T17:17:59+00:00"
         },
         {
             "name": "symfony/var-dumper",
-            "version": "v3.4.30",
+            "version": "v3.4.35",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/var-dumper.git",
-                "reference": "b6a45abfe961183a4c26fad98a6112c487e983bf"
+                "reference": "569e261461600810845a8305ca3f64abd3e712c0"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/var-dumper/zipball/b6a45abfe961183a4c26fad98a6112c487e983bf",
-                "reference": "b6a45abfe961183a4c26fad98a6112c487e983bf",
+                "url": "https://api.github.com/repos/symfony/var-dumper/zipball/569e261461600810845a8305ca3f64abd3e712c0",
+                "reference": "569e261461600810845a8305ca3f64abd3e712c0",
                 "shasum": ""
             },
             "require": {
@@ -2334,20 +2444,20 @@
                 "debug",
                 "dump"
             ],
-            "time": "2019-07-26T11:29:23+00:00"
+            "time": "2019-10-10T11:03:19+00:00"
         },
         {
             "name": "symfony/web-profiler-bundle",
-            "version": "v3.4.30",
+            "version": "v3.4.35",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/web-profiler-bundle.git",
-                "reference": "0e9627b1a3864949fa1d72eec78dab02830b5206"
+                "reference": "b4c78b585d60a0b96ed735ce40f964bd3a228f73"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/web-profiler-bundle/zipball/0e9627b1a3864949fa1d72eec78dab02830b5206",
-                "reference": "0e9627b1a3864949fa1d72eec78dab02830b5206",
+                "url": "https://api.github.com/repos/symfony/web-profiler-bundle/zipball/b4c78b585d60a0b96ed735ce40f964bd3a228f73",
+                "reference": "b4c78b585d60a0b96ed735ce40f964bd3a228f73",
                 "shasum": ""
             },
             "require": {
@@ -2401,7 +2511,7 @@
             ],
             "description": "Symfony WebProfilerBundle",
             "homepage": "https://symfony.com",
-            "time": "2019-07-24T10:33:03+00:00"
+            "time": "2019-10-01T15:13:36+00:00"
         }
     ],
     "aliases": [],
diff --git a/lib/symfony/console/Tests/Fixtures/FooHiddenCommand.php b/lib/symfony/console/Tests/Fixtures/FooHiddenCommand.php
new file mode 100644
index 000000000..75fbf7804
--- /dev/null
+++ b/lib/symfony/console/Tests/Fixtures/FooHiddenCommand.php
@@ -0,0 +1,21 @@
+<?php
+
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+
+class FooHiddenCommand extends Command
+{
+    protected function configure()
+    {
+        $this
+            ->setName('foo:hidden')
+            ->setAliases(['afoohidden'])
+            ->setHidden(true)
+        ;
+    }
+
+    protected function execute(InputInterface $input, OutputInterface $output)
+    {
+    }
+}
diff --git a/lib/symfony/framework-bundle/Test/ForwardCompatTestTrait.php b/lib/symfony/framework-bundle/Test/ForwardCompatTestTrait.php
new file mode 100644
index 000000000..6fb7479e2
--- /dev/null
+++ b/lib/symfony/framework-bundle/Test/ForwardCompatTestTrait.php
@@ -0,0 +1,82 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Bundle\FrameworkBundle\Test;
+
+use PHPUnit\Framework\TestCase;
+
+// Auto-adapt to PHPUnit 8 that added a `void` return-type to the setUp/tearDown methods
+
+if (method_exists(\ReflectionMethod::class, 'hasReturnType') && (new \ReflectionMethod(TestCase::class, 'tearDown'))->hasReturnType()) {
+    eval('
+    namespace Symfony\Bundle\FrameworkBundle\Test;
+
+    /**
+     * @internal
+     */
+    trait ForwardCompatTestTrait
+    {
+        private function doSetUp(): void
+        {
+        }
+
+        private function doTearDown(): void
+        {
+        }
+
+        protected function setUp(): void
+        {
+            $this->doSetUp();
+        }
+
+        protected function tearDown(): void
+        {
+            $this->doTearDown();
+        }
+    }
+');
+} else {
+    /**
+     * @internal
+     */
+    trait ForwardCompatTestTrait
+    {
+        /**
+         * @return void
+         */
+        private function doSetUp()
+        {
+        }
+
+        /**
+         * @return void
+         */
+        private function doTearDown()
+        {
+        }
+
+        /**
+         * @return void
+         */
+        protected function setUp()
+        {
+            $this->doSetUp();
+        }
+
+        /**
+         * @return void
+         */
+        protected function tearDown()
+        {
+            $this->doTearDown();
+        }
+    }
+}
diff --git a/lib/symfony/framework-bundle/Tests/Fixtures/Serialization/Resources/does_not_exist.yaml b/lib/symfony/framework-bundle/Tests/Fixtures/Serialization/Resources/does_not_exist.yaml
new file mode 100644
index 000000000..061691224
--- /dev/null
+++ b/lib/symfony/framework-bundle/Tests/Fixtures/Serialization/Resources/does_not_exist.yaml
@@ -0,0 +1 @@
+AClassThatDoesNotExist_FWB_CacheWarmer_SerializerCacheWarmerTest: ~
diff --git a/lib/symfony/framework-bundle/Tests/Fixtures/Validation/Resources/does_not_exist.yaml b/lib/symfony/framework-bundle/Tests/Fixtures/Validation/Resources/does_not_exist.yaml
new file mode 100644
index 000000000..69b1635e4
--- /dev/null
+++ b/lib/symfony/framework-bundle/Tests/Fixtures/Validation/Resources/does_not_exist.yaml
@@ -0,0 +1 @@
+AClassThatDoesNotExist_FWB_CacheWarmer_ValidatorCacheWarmerTest: ~
diff --git a/lib/symfony/http-foundation/Tests/File/Fixtures/-test b/lib/symfony/http-foundation/Tests/File/Fixtures/-test
new file mode 100644
index 000000000..b636f4b8d
Binary files /dev/null and b/lib/symfony/http-foundation/Tests/File/Fixtures/-test differ
diff --git a/lib/symfony/polyfill-php56/LICENSE b/lib/symfony/polyfill-php56/LICENSE
new file mode 100644
index 000000000..4cd8bdd30
--- /dev/null
+++ b/lib/symfony/polyfill-php56/LICENSE
@@ -0,0 +1,19 @@
+Copyright (c) 2015-2019 Fabien Potencier
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is furnished
+to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/lib/symfony/polyfill-php56/Php56.php b/lib/symfony/polyfill-php56/Php56.php
new file mode 100644
index 000000000..dbbc0e13a
--- /dev/null
+++ b/lib/symfony/polyfill-php56/Php56.php
@@ -0,0 +1,138 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Polyfill\Php56;
+
+use Symfony\Polyfill\Util\Binary;
+
+/**
+ * @internal
+ */
+final class Php56
+{
+    const LDAP_ESCAPE_FILTER = 1;
+    const LDAP_ESCAPE_DN = 2;
+
+    public static function hash_equals($knownString, $userInput)
+    {
+        if (!\is_string($knownString)) {
+            trigger_error('Expected known_string to be a string, '.\gettype($knownString).' given', E_USER_WARNING);
+
+            return false;
+        }
+
+        if (!\is_string($userInput)) {
+            trigger_error('Expected user_input to be a string, '.\gettype($userInput).' given', E_USER_WARNING);
+
+            return false;
+        }
+
+        $knownLen = Binary::strlen($knownString);
+        $userLen = Binary::strlen($userInput);
+
+        if ($knownLen !== $userLen) {
+            return false;
+        }
+
+        $result = 0;
+
+        for ($i = 0; $i < $knownLen; ++$i) {
+            $result |= \ord($knownString[$i]) ^ \ord($userInput[$i]);
+        }
+
+        return 0 === $result;
+    }
+
+    /**
+     * Stub implementation of the {@link ldap_escape()} function of the ldap
+     * extension.
+     *
+     * Escape strings for safe use in LDAP filters and DNs.
+     *
+     * @author Chris Wright <ldapi@daverandom.com>
+     *
+     * @param string $subject
+     * @param string $ignore
+     * @param int    $flags
+     *
+     * @return string
+     *
+     * @see http://stackoverflow.com/a/8561604
+     */
+    public static function ldap_escape($subject, $ignore = '', $flags = 0)
+    {
+        static $charMaps = null;
+
+        if (null === $charMaps) {
+            $charMaps = array(
+                self::LDAP_ESCAPE_FILTER => array('\\', '*', '(', ')', "\x00"),
+                self::LDAP_ESCAPE_DN => array('\\', ',', '=', '+', '<', '>', ';', '"', '#', "\r"),
+            );
+
+            $charMaps[0] = array();
+
+            for ($i = 0; $i < 256; ++$i) {
+                $charMaps[0][\chr($i)] = sprintf('\\%02x', $i);
+            }
+
+            for ($i = 0, $l = \count($charMaps[self::LDAP_ESCAPE_FILTER]); $i < $l; ++$i) {
+                $chr = $charMaps[self::LDAP_ESCAPE_FILTER][$i];
+                unset($charMaps[self::LDAP_ESCAPE_FILTER][$i]);
+                $charMaps[self::LDAP_ESCAPE_FILTER][$chr] = $charMaps[0][$chr];
+            }
+
+            for ($i = 0, $l = \count($charMaps[self::LDAP_ESCAPE_DN]); $i < $l; ++$i) {
+                $chr = $charMaps[self::LDAP_ESCAPE_DN][$i];
+                unset($charMaps[self::LDAP_ESCAPE_DN][$i]);
+                $charMaps[self::LDAP_ESCAPE_DN][$chr] = $charMaps[0][$chr];
+            }
+        }
+
+        // Create the base char map to escape
+        $flags = (int) $flags;
+        $charMap = array();
+
+        if ($flags & self::LDAP_ESCAPE_FILTER) {
+            $charMap += $charMaps[self::LDAP_ESCAPE_FILTER];
+        }
+
+        if ($flags & self::LDAP_ESCAPE_DN) {
+            $charMap += $charMaps[self::LDAP_ESCAPE_DN];
+        }
+
+        if (!$charMap) {
+            $charMap = $charMaps[0];
+        }
+
+        // Remove any chars to ignore from the list
+        $ignore = (string) $ignore;
+
+        for ($i = 0, $l = \strlen($ignore); $i < $l; ++$i) {
+            unset($charMap[$ignore[$i]]);
+        }
+
+        // Do the main replacement
+        $result = strtr($subject, $charMap);
+
+        // Encode leading/trailing spaces if self::LDAP_ESCAPE_DN is passed
+        if ($flags & self::LDAP_ESCAPE_DN) {
+            if (' ' === $result[0]) {
+                $result = '\\20'.substr($result, 1);
+            }
+
+            if (' ' === $result[\strlen($result) - 1]) {
+                $result = substr($result, 0, -1).'\\20';
+            }
+        }
+
+        return $result;
+    }
+}
diff --git a/lib/symfony/polyfill-php56/README.md b/lib/symfony/polyfill-php56/README.md
new file mode 100644
index 000000000..307ce5bc5
--- /dev/null
+++ b/lib/symfony/polyfill-php56/README.md
@@ -0,0 +1,15 @@
+Symfony Polyfill / Php56
+========================
+
+This component provides functions unavailable in releases prior to PHP 5.6:
+
+- [`hash_equals`](http://php.net/hash_equals)  (part of [hash](http://php.net/hash) extension)
+- [`ldap_escape`](http://php.net/ldap_escape) (part of [ldap](http://php.net/ldap) extension)
+
+More information can be found in the
+[main Polyfill README](https://github.com/symfony/polyfill/blob/master/README.md).
+
+License
+=======
+
+This library is released under the [MIT license](LICENSE).
diff --git a/lib/symfony/polyfill-php56/bootstrap.php b/lib/symfony/polyfill-php56/bootstrap.php
new file mode 100644
index 000000000..587c2a81c
--- /dev/null
+++ b/lib/symfony/polyfill-php56/bootstrap.php
@@ -0,0 +1,38 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+use Symfony\Polyfill\Php56 as p;
+
+if (PHP_VERSION_ID < 50600) {
+    if (!function_exists('hash_equals')) {
+        function hash_equals($knownString, $userInput) { return p\Php56::hash_equals($knownString, $userInput); }
+    }
+    if (extension_loaded('ldap') && !function_exists('ldap_escape')) {
+        define('LDAP_ESCAPE_FILTER', 1);
+        define('LDAP_ESCAPE_DN', 2);
+
+        function ldap_escape($subject, $ignore = '', $flags = 0) { return p\Php56::ldap_escape($subject, $ignore, $flags); }
+    }
+
+    if (50509 === PHP_VERSION_ID && 4 === PHP_INT_SIZE) {
+        // Missing functions in PHP 5.5.9 - affects 32 bit builds of Ubuntu 14.04LTS
+        // See https://bugs.launchpad.net/ubuntu/+source/php5/+bug/1315888
+        if (!function_exists('gzopen') && function_exists('gzopen64')) {
+            function gzopen($filename, $mode, $use_include_path = 0) { return gzopen64($filename, $mode, $use_include_path); }
+        }
+        if (!function_exists('gzseek') && function_exists('gzseek64')) {
+            function gzseek($zp, $offset, $whence = SEEK_SET) { return gzseek64($zp, $offset, $whence); }
+        }
+        if (!function_exists('gztell') && function_exists('gztell64')) {
+            function gztell($zp) { return gztell64($zp); }
+        }
+    }
+}
diff --git a/lib/symfony/polyfill-php56/composer.json b/lib/symfony/polyfill-php56/composer.json
new file mode 100644
index 000000000..81f58fb46
--- /dev/null
+++ b/lib/symfony/polyfill-php56/composer.json
@@ -0,0 +1,32 @@
+{
+    "name": "symfony/polyfill-php56",
+    "type": "library",
+    "description": "Symfony polyfill backporting some PHP 5.6+ features to lower PHP versions",
+    "keywords": ["polyfill", "shim", "compatibility", "portable"],
+    "homepage": "https://symfony.com",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Nicolas Grekas",
+            "email": "p@tchwork.com"
+        },
+        {
+            "name": "Symfony Community",
+            "homepage": "https://symfony.com/contributors"
+        }
+    ],
+    "require": {
+        "php": ">=5.3.3",
+        "symfony/polyfill-util": "~1.0"
+    },
+    "autoload": {
+        "psr-4": { "Symfony\\Polyfill\\Php56\\": "" },
+        "files": [ "bootstrap.php" ]
+    },
+    "minimum-stability": "dev",
+    "extra": {
+        "branch-alias": {
+            "dev-master": "1.12-dev"
+        }
+    }
+}
diff --git a/lib/symfony/polyfill-util/Binary.php b/lib/symfony/polyfill-util/Binary.php
new file mode 100644
index 000000000..23ff97473
--- /dev/null
+++ b/lib/symfony/polyfill-util/Binary.php
@@ -0,0 +1,22 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Polyfill\Util;
+
+if (\extension_loaded('mbstring')) {
+    class Binary extends BinaryOnFuncOverload
+    {
+    }
+} else {
+    class Binary extends BinaryNoFuncOverload
+    {
+    }
+}
diff --git a/lib/symfony/polyfill-util/BinaryNoFuncOverload.php b/lib/symfony/polyfill-util/BinaryNoFuncOverload.php
new file mode 100644
index 000000000..800ad75d0
--- /dev/null
+++ b/lib/symfony/polyfill-util/BinaryNoFuncOverload.php
@@ -0,0 +1,65 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Polyfill\Util;
+
+/**
+ * @author Nicolas Grekas <p@tchwork.com>
+ *
+ * @internal
+ */
+class BinaryNoFuncOverload
+{
+    public static function strlen($s)
+    {
+        return \strlen($s);
+    }
+
+    public static function strpos($haystack, $needle, $offset = 0)
+    {
+        return strpos($haystack, $needle, $offset);
+    }
+
+    public static function strrpos($haystack, $needle, $offset = 0)
+    {
+        return strrpos($haystack, $needle, $offset);
+    }
+
+    public static function substr($string, $start, $length = PHP_INT_MAX)
+    {
+        return substr($string, $start, $length);
+    }
+
+    public static function stripos($s, $needle, $offset = 0)
+    {
+        return stripos($s, $needle, $offset);
+    }
+
+    public static function stristr($s, $needle, $part = false)
+    {
+        return stristr($s, $needle, $part);
+    }
+
+    public static function strrchr($s, $needle, $part = false)
+    {
+        return strrchr($s, $needle, $part);
+    }
+
+    public static function strripos($s, $needle, $offset = 0)
+    {
+        return strripos($s, $needle, $offset);
+    }
+
+    public static function strstr($s, $needle, $part = false)
+    {
+        return strstr($s, $needle, $part);
+    }
+}
diff --git a/lib/symfony/polyfill-util/BinaryOnFuncOverload.php b/lib/symfony/polyfill-util/BinaryOnFuncOverload.php
new file mode 100644
index 000000000..e1b886eac
--- /dev/null
+++ b/lib/symfony/polyfill-util/BinaryOnFuncOverload.php
@@ -0,0 +1,67 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Polyfill\Util;
+
+/**
+ * Binary safe version of string functions overloaded when MB_OVERLOAD_STRING is enabled.
+ *
+ * @author Nicolas Grekas <p@tchwork.com>
+ *
+ * @internal
+ */
+class BinaryOnFuncOverload
+{
+    public static function strlen($s)
+    {
+        return mb_strlen($s, '8bit');
+    }
+
+    public static function strpos($haystack, $needle, $offset = 0)
+    {
+        return mb_strpos($haystack, $needle, $offset, '8bit');
+    }
+
+    public static function strrpos($haystack, $needle, $offset = 0)
+    {
+        return mb_strrpos($haystack, $needle, $offset, '8bit');
+    }
+
+    public static function substr($string, $start, $length = 2147483647)
+    {
+        return mb_substr($string, $start, $length, '8bit');
+    }
+
+    public static function stripos($s, $needle, $offset = 0)
+    {
+        return mb_stripos($s, $needle, $offset, '8bit');
+    }
+
+    public static function stristr($s, $needle, $part = false)
+    {
+        return mb_stristr($s, $needle, $part, '8bit');
+    }
+
+    public static function strrchr($s, $needle, $part = false)
+    {
+        return mb_strrchr($s, $needle, $part, '8bit');
+    }
+
+    public static function strripos($s, $needle, $offset = 0)
+    {
+        return mb_strripos($s, $needle, $offset, '8bit');
+    }
+
+    public static function strstr($s, $needle, $part = false)
+    {
+        return mb_strstr($s, $needle, $part, '8bit');
+    }
+}
diff --git a/lib/symfony/polyfill-util/LICENSE b/lib/symfony/polyfill-util/LICENSE
new file mode 100644
index 000000000..4cd8bdd30
--- /dev/null
+++ b/lib/symfony/polyfill-util/LICENSE
@@ -0,0 +1,19 @@
+Copyright (c) 2015-2019 Fabien Potencier
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is furnished
+to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/lib/symfony/polyfill-util/README.md b/lib/symfony/polyfill-util/README.md
new file mode 100644
index 000000000..1c655fce3
--- /dev/null
+++ b/lib/symfony/polyfill-util/README.md
@@ -0,0 +1,13 @@
+Symfony Polyfill / Util
+=======================
+
+This component provides binary-safe string functions, using the
+[mbstring](https://php.net/mbstring) extension when available.
+
+More information can be found in the
+[main Polyfill README](https://github.com/symfony/polyfill/blob/master/README.md).
+
+License
+=======
+
+This library is released under the [MIT license](LICENSE).
diff --git a/lib/symfony/polyfill-util/TestListener.php b/lib/symfony/polyfill-util/TestListener.php
new file mode 100644
index 000000000..6b17d45cc
--- /dev/null
+++ b/lib/symfony/polyfill-util/TestListener.php
@@ -0,0 +1,28 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Polyfill\Util;
+
+if (class_exists('PHPUnit_Runner_Version') && version_compare(\PHPUnit_Runner_Version::id(), '6.0.0', '<')) {
+    class_alias('Symfony\Polyfill\Util\TestListenerForV5', 'Symfony\Polyfill\Util\TestListener');
+// Using an early return instead of a else does not work when using the PHPUnit phar due to some weird PHP behavior (the class
+// gets defined without executing the code before it and so the definition is not properly conditional)
+} elseif (version_compare(\PHPUnit\Runner\Version::id(), '7.0.0', '<')) {
+    class_alias('Symfony\Polyfill\Util\TestListenerForV6', 'Symfony\Polyfill\Util\TestListener');
+} else {
+    class_alias('Symfony\Polyfill\Util\TestListenerForV7', 'Symfony\Polyfill\Util\TestListener');
+}
+
+if (false) {
+    class TestListener
+    {
+    }
+}
diff --git a/lib/symfony/polyfill-util/TestListenerForV5.php b/lib/symfony/polyfill-util/TestListenerForV5.php
new file mode 100644
index 000000000..501053ddd
--- /dev/null
+++ b/lib/symfony/polyfill-util/TestListenerForV5.php
@@ -0,0 +1,89 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Polyfill\Util;
+
+/**
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class TestListenerForV5 extends \PHPUnit_Framework_TestSuite implements \PHPUnit_Framework_TestListener
+{
+    private $suite;
+    private $trait;
+
+    public function __construct(\PHPUnit_Framework_TestSuite $suite = null)
+    {
+        if ($suite) {
+            $this->suite = $suite;
+            $this->setName($suite->getName().' with polyfills enabled');
+            $this->addTest($suite);
+        }
+        $this->trait = new TestListenerTrait();
+    }
+
+    public function startTestSuite(\PHPUnit_Framework_TestSuite $suite)
+    {
+        $this->trait->startTestSuite($suite);
+    }
+
+    public function addError(\PHPUnit_Framework_Test $test, \Exception $e, $time)
+    {
+        $this->trait->addError($test, $e, $time);
+    }
+
+    public function addWarning(\PHPUnit_Framework_Test $test, \PHPUnit_Framework_Warning $e, $time)
+    {
+    }
+
+    public function addFailure(\PHPUnit_Framework_Test $test, \PHPUnit_Framework_AssertionFailedError $e, $time)
+    {
+        $this->trait->addError($test, $e, $time);
+    }
+
+    public function addIncompleteTest(\PHPUnit_Framework_Test $test, \Exception $e, $time)
+    {
+    }
+
+    public function addRiskyTest(\PHPUnit_Framework_Test $test, \Exception $e, $time)
+    {
+    }
+
+    public function addSkippedTest(\PHPUnit_Framework_Test $test, \Exception $e, $time)
+    {
+    }
+
+    public function endTestSuite(\PHPUnit_Framework_TestSuite $suite)
+    {
+    }
+
+    public function startTest(\PHPUnit_Framework_Test $test)
+    {
+    }
+
+    public function endTest(\PHPUnit_Framework_Test $test, $time)
+    {
+    }
+
+    public static function warning($message)
+    {
+        return parent::warning($message);
+    }
+
+    protected function setUp()
+    {
+        TestListenerTrait::$enabledPolyfills = $this->suite->getName();
+    }
+
+    protected function tearDown()
+    {
+        TestListenerTrait::$enabledPolyfills = false;
+    }
+}
diff --git a/lib/symfony/polyfill-util/TestListenerForV6.php b/lib/symfony/polyfill-util/TestListenerForV6.php
new file mode 100644
index 000000000..e9e87cbef
--- /dev/null
+++ b/lib/symfony/polyfill-util/TestListenerForV6.php
@@ -0,0 +1,95 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Polyfill\Util;
+
+use PHPUnit\Framework\AssertionFailedError;
+use PHPUnit\Framework\Test;
+use PHPUnit\Framework\TestListener as TestListenerInterface;
+use PHPUnit\Framework\TestSuite;
+use PHPUnit\Framework\Warning;
+
+/**
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class TestListenerForV6 extends TestSuite implements TestListenerInterface
+{
+    private $suite;
+    private $trait;
+
+    public function __construct(TestSuite $suite = null)
+    {
+        if ($suite) {
+            $this->suite = $suite;
+            $this->setName($suite->getName().' with polyfills enabled');
+            $this->addTest($suite);
+        }
+        $this->trait = new TestListenerTrait();
+    }
+
+    public function startTestSuite(TestSuite $suite)
+    {
+        $this->trait->startTestSuite($suite);
+    }
+
+    public function addError(Test $test, \Exception $e, $time)
+    {
+        $this->trait->addError($test, $e, $time);
+    }
+
+    public function addWarning(Test $test, Warning $e, $time)
+    {
+    }
+
+    public function addFailure(Test $test, AssertionFailedError $e, $time)
+    {
+        $this->trait->addError($test, $e, $time);
+    }
+
+    public function addIncompleteTest(Test $test, \Exception $e, $time)
+    {
+    }
+
+    public function addRiskyTest(Test $test, \Exception $e, $time)
+    {
+    }
+
+    public function addSkippedTest(Test $test, \Exception $e, $time)
+    {
+    }
+
+    public function endTestSuite(TestSuite $suite)
+    {
+    }
+
+    public function startTest(Test $test)
+    {
+    }
+
+    public function endTest(Test $test, $time)
+    {
+    }
+
+    public static function warning($message)
+    {
+        return parent::warning($message);
+    }
+
+    protected function setUp()
+    {
+        TestListenerTrait::$enabledPolyfills = $this->suite->getName();
+    }
+
+    protected function tearDown()
+    {
+        TestListenerTrait::$enabledPolyfills = false;
+    }
+}
diff --git a/lib/symfony/polyfill-util/TestListenerForV7.php b/lib/symfony/polyfill-util/TestListenerForV7.php
new file mode 100644
index 000000000..b304bfaea
--- /dev/null
+++ b/lib/symfony/polyfill-util/TestListenerForV7.php
@@ -0,0 +1,96 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Polyfill\Util;
+
+use PHPUnit\Framework\AssertionFailedError;
+use PHPUnit\Framework\Test;
+use PHPUnit\Framework\TestListener as TestListenerInterface;
+use PHPUnit\Framework\TestSuite;
+use PHPUnit\Framework\Warning;
+use PHPUnit\Framework\WarningTestCase;
+
+/**
+ * @author Ion Bazan <ion.bazan@gmail.com>
+ */
+class TestListenerForV7 extends TestSuite implements TestListenerInterface
+{
+    private $suite;
+    private $trait;
+
+    public function __construct(TestSuite $suite = null)
+    {
+        if ($suite) {
+            $this->suite = $suite;
+            $this->setName($suite->getName().' with polyfills enabled');
+            $this->addTest($suite);
+        }
+        $this->trait = new TestListenerTrait();
+    }
+
+    public function startTestSuite(TestSuite $suite): void
+    {
+        $this->trait->startTestSuite($suite);
+    }
+
+    public function addError(Test $test, \Throwable $t, float $time): void
+    {
+        $this->trait->addError($test, $t, $time);
+    }
+
+    public function addWarning(Test $test, Warning $e, float $time): void
+    {
+    }
+
+    public function addFailure(Test $test, AssertionFailedError $e, float $time): void
+    {
+        $this->trait->addError($test, $e, $time);
+    }
+
+    public function addIncompleteTest(Test $test, \Throwable $t, float $time): void
+    {
+    }
+
+    public function addRiskyTest(Test $test, \Throwable $t, float $time): void
+    {
+    }
+
+    public function addSkippedTest(Test $test, \Throwable $t, float $time): void
+    {
+    }
+
+    public function endTestSuite(TestSuite $suite): void
+    {
+    }
+
+    public function startTest(Test $test): void
+    {
+    }
+
+    public function endTest(Test $test, float $time): void
+    {
+    }
+
+    public static function warning($message): WarningTestCase
+    {
+        return parent::warning($message);
+    }
+
+    protected function setUp(): void
+    {
+        TestListenerTrait::$enabledPolyfills = $this->suite->getName();
+    }
+
+    protected function tearDown(): void
+    {
+        TestListenerTrait::$enabledPolyfills = false;
+    }
+}
diff --git a/lib/symfony/polyfill-util/TestListenerTrait.php b/lib/symfony/polyfill-util/TestListenerTrait.php
new file mode 100644
index 000000000..d8047a0cc
--- /dev/null
+++ b/lib/symfony/polyfill-util/TestListenerTrait.php
@@ -0,0 +1,125 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Polyfill\Util;
+
+/**
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class TestListenerTrait
+{
+    public static $enabledPolyfills;
+
+    public function startTestSuite($mainSuite)
+    {
+        if (null !== self::$enabledPolyfills) {
+            return;
+        }
+        self::$enabledPolyfills = false;
+        $SkippedTestError = class_exists('PHPUnit\Framework\SkippedTestError') ? 'PHPUnit\Framework\SkippedTestError' : 'PHPUnit_Framework_SkippedTestError';
+
+        foreach ($mainSuite->tests() as $suite) {
+            $testClass = $suite->getName();
+            if (!$tests = $suite->tests()) {
+                continue;
+            }
+            if (!preg_match('/^(.+)\\\\Tests(\\\\.*)Test$/', $testClass, $m)) {
+                $mainSuite->addTest(TestListener::warning('Unknown naming convention for '.$testClass));
+                continue;
+            }
+            if (!class_exists($m[1].$m[2])) {
+                continue;
+            }
+            $testedClass = new \ReflectionClass($m[1].$m[2]);
+            $bootstrap = new \SplFileObject(\dirname($testedClass->getFileName()).'/bootstrap.php');
+            $warnings = array();
+            $defLine = null;
+
+            foreach (new \RegexIterator($bootstrap, '/define\(\'/') as $defLine) {
+                preg_match('/define\(\'(?P<name>.+)\'/', $defLine, $matches);
+                if (\defined($matches['name'])) {
+                    continue;
+                }
+
+                try {
+                    eval($defLine);
+                } catch (\PHPUnit_Framework_Exception $ex){
+                    $warnings[] = TestListener::warning($ex->getMessage());
+                } catch (\PHPUnit\Framework\Exception $ex) {
+                    $warnings[] = TestListener::warning($ex->getMessage());
+                }
+            }
+
+            $bootstrap->rewind();
+
+            foreach (new \RegexIterator($bootstrap, '/return p\\\\'.$testedClass->getShortName().'::/') as $defLine) {
+                if (!preg_match('/^\s*function (?P<name>[^\(]++)(?P<signature>\(.*\)) \{ (?<return>return p\\\\'.$testedClass->getShortName().'::[^\(]++)(?P<args>\([^\)]*+\)); \}$/', $defLine, $f)) {
+                    $warnings[] = TestListener::warning('Invalid line in bootstrap.php: '.trim($defLine));
+                    continue;
+                }
+                $testNamespace = substr($testClass, 0, strrpos($testClass, '\\'));
+                if (\function_exists($testNamespace.'\\'.$f['name'])) {
+                    continue;
+                }
+
+                try {
+                    $r = new \ReflectionFunction($f['name']);
+                    if ($r->isUserDefined()) {
+                        throw new \ReflectionException();
+                    }
+                    if ('idn_to_ascii' === $f['name'] || 'idn_to_utf8' === $f['name']) {
+                        $defLine = sprintf('return INTL_IDNA_VARIANT_2003 === $variant ? \\%s($domain, $options, $variant) : \\%1$s%s', $f['name'], $f['args']);
+                    } elseif (false !== strpos($f['signature'], '&') && 'idn_to_ascii' !== $f['name'] && 'idn_to_utf8' !== $f['name']) {
+                        $defLine = sprintf('return \\%s%s', $f['name'], $f['args']);
+                    } else {
+                        $defLine = sprintf("return \\call_user_func_array('%s', \\func_get_args())", $f['name']);
+                    }
+                } catch (\ReflectionException $e) {
+                    $defLine = sprintf("throw new \\{$SkippedTestError}('Internal function not found: %s')", $f['name']);
+                }
+
+                eval(<<<EOPHP
+namespace {$testNamespace};
+
+use Symfony\Polyfill\Util\TestListenerTrait;
+use {$testedClass->getNamespaceName()} as p;
+
+function {$f['name']}{$f['signature']}
+{
+    if ('{$testClass}' === TestListenerTrait::\$enabledPolyfills) {
+        {$f['return']}{$f['args']};
+    }
+
+    {$defLine};
+}
+EOPHP
+                );
+            }
+            if (!$warnings && null === $defLine) {
+                $warnings[] = new $SkippedTestError('No Polyfills found in bootstrap.php for '.$testClass);
+            } else {
+                $mainSuite->addTest(new TestListener($suite));
+            }
+        }
+        foreach ($warnings as $w) {
+            $mainSuite->addTest($w);
+        }
+    }
+
+    public function addError($test, \Exception $e, $time)
+    {
+        if (false !== self::$enabledPolyfills) {
+            $r = new \ReflectionProperty('Exception', 'message');
+            $r->setAccessible(true);
+            $r->setValue($e, 'Polyfills enabled, '.$r->getValue($e));
+        }
+    }
+}
diff --git a/lib/symfony/polyfill-util/composer.json b/lib/symfony/polyfill-util/composer.json
new file mode 100644
index 000000000..fa9132bd7
--- /dev/null
+++ b/lib/symfony/polyfill-util/composer.json
@@ -0,0 +1,30 @@
+{
+    "name": "symfony/polyfill-util",
+    "type": "library",
+    "description": "Symfony utilities for portability of PHP codes",
+    "keywords": ["polyfill", "shim", "compat", "compatibility"],
+    "homepage": "https://symfony.com",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Nicolas Grekas",
+            "email": "p@tchwork.com"
+        },
+        {
+            "name": "Symfony Community",
+            "homepage": "https://symfony.com/contributors"
+        }
+    ],
+    "require": {
+        "php": ">=5.3.3"
+    },
+    "autoload": {
+        "psr-4": { "Symfony\\Polyfill\\Util\\": "" }
+    },
+    "minimum-stability": "dev",
+    "extra": {
+        "branch-alias": {
+            "dev-master": "1.12-dev"
+        }
+    }
+}
diff --git a/lib/twig/twig/.gitattributes b/lib/twig/twig/.gitattributes
new file mode 100644
index 000000000..3a3ce6e7c
--- /dev/null
+++ b/lib/twig/twig/.gitattributes
@@ -0,0 +1,2 @@
+/tests export-ignore
+/phpunit.xml.dist export-ignore