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/DependencyInjection/ServicesResetter.php

@@ -11,6 +11,8 @@
 
 namespace Symfony\Component\HttpKernel\DependencyInjection;
 
+use Symfony\Contracts\Service\ResetInterface;
+
 /**
  * Resets provided services.
  *
@@ -19,11 +21,15 @@ namespace Symfony\Component\HttpKernel\DependencyInjection;
  *
  * @internal
  */
-class ServicesResetter
+class ServicesResetter implements ResetInterface
 {
     private $resettableServices;
     private $resetMethods;
 
+    /**
+     * @param \Traversable<string, object>   $resettableServices
+     * @param array<string, string|string[]> $resetMethods
+     */
     public function __construct(\Traversable $resettableServices, array $resetMethods)
     {
         $this->resettableServices = $resettableServices;
@@ -33,7 +39,13 @@ class ServicesResetter
     public function reset()
     {
         foreach ($this->resettableServices as $id => $service) {
-            $service->{$this->resetMethods[$id]}();
+            foreach ((array) $this->resetMethods[$id] as $resetMethod) {
+                if ('?' === $resetMethod[0] && !method_exists($service, $resetMethod = substr($resetMethod, 1))) {
+                    continue;
+                }
+
+                $service->$resetMethod();
+            }
         }
     }
 }