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/dependency-injection/Argument/ServiceLocator.php

@@ -0,0 +1,52 @@
+<?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\DependencyInjection\Argument;
+
+use Symfony\Component\DependencyInjection\ServiceLocator as BaseServiceLocator;
+
+/**
+ * @author Nicolas Grekas <p@tchwork.com>
+ *
+ * @internal
+ */
+class ServiceLocator extends BaseServiceLocator
+{
+    private $factory;
+    private $serviceMap;
+    private $serviceTypes;
+
+    public function __construct(\Closure $factory, array $serviceMap, array $serviceTypes = null)
+    {
+        $this->factory = $factory;
+        $this->serviceMap = $serviceMap;
+        $this->serviceTypes = $serviceTypes;
+        parent::__construct($serviceMap);
+    }
+
+    /**
+     * {@inheritdoc}
+     *
+     * @return mixed
+     */
+    public function get(string $id)
+    {
+        return isset($this->serviceMap[$id]) ? ($this->factory)(...$this->serviceMap[$id]) : parent::get($id);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getProvidedServices(): array
+    {
+        return $this->serviceTypes ?? $this->serviceTypes = array_map(function () { return '?'; }, $this->serviceMap);
+    }
+}