migration symfony 5 4 (#300)

* symfony 5.4 (diff dev)

* symfony 5.4 (working)

* symfony 5.4 (update autoload)

* symfony 5.4 (remove swiftmailer mailer implementation)

* symfony 5.4 (php doc and split Global accessor class)


### Impacted packages:

composer require php:">=7.2.5 <8.0.0" symfony/console:5.4.* symfony/dotenv:5.4.* symfony/framework-bundle:5.4.* symfony/twig-bundle:5.4.* symfony/yaml:5.4.* --update-with-dependencies

composer require symfony/stopwatch:5.4.* symfony/web-profiler-bundle:5.4.* --dev --update-with-dependencies

lib/symfony/http-kernel/Controller/ArgumentResolver/TraceableValueResolver.php

@@ -0,0 +1,62 @@
+<?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\Component\HttpKernel\Controller\ArgumentResolver;
+
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpKernel\Controller\ArgumentValueResolverInterface;
+use Symfony\Component\HttpKernel\ControllerMetadata\ArgumentMetadata;
+use Symfony\Component\Stopwatch\Stopwatch;
+
+/**
+ * Provides timing information via the stopwatch.
+ *
+ * @author Iltar van der Berg <kjarli@gmail.com>
+ */
+final class TraceableValueResolver implements ArgumentValueResolverInterface
+{
+    private $inner;
+    private $stopwatch;
+
+    public function __construct(ArgumentValueResolverInterface $inner, Stopwatch $stopwatch)
+    {
+        $this->inner = $inner;
+        $this->stopwatch = $stopwatch;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function supports(Request $request, ArgumentMetadata $argument): bool
+    {
+        $method = \get_class($this->inner).'::'.__FUNCTION__;
+        $this->stopwatch->start($method, 'controller.argument_value_resolver');
+
+        $return = $this->inner->supports($request, $argument);
+
+        $this->stopwatch->stop($method);
+
+        return $return;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function resolve(Request $request, ArgumentMetadata $argument): iterable
+    {
+        $method = \get_class($this->inner).'::'.__FUNCTION__;
+        $this->stopwatch->start($method, 'controller.argument_value_resolver');
+
+        yield from $this->inner->resolve($request, $argument);
+
+        $this->stopwatch->stop($method);
+    }
+}