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/Bundle/BundleInterface.php

@@ -42,34 +42,21 @@ interface BundleInterface extends ContainerAwareInterface
     /**
      * Returns the container extension that should be implicitly loaded.
      *
-     * @return ExtensionInterface|null The default extension or null if there is none
+     * @return ExtensionInterface|null
      */
     public function getContainerExtension();
 
-    /**
-     * Returns the bundle name that this bundle overrides.
-     *
-     * Despite its name, this method does not imply any parent/child relationship
-     * between the bundles, just a way to extend and override an existing
-     * bundle.
-     *
-     * @return string The Bundle name it overrides or null if no parent
-     *
-     * @deprecated This method is deprecated as of 3.4 and will be removed in 4.0.
-     */
-    public function getParent();
-
     /**
      * Returns the bundle name (the class short name).
      *
-     * @return string The Bundle name
+     * @return string
      */
     public function getName();
 
     /**
      * Gets the Bundle namespace.
      *
-     * @return string The Bundle namespace
+     * @return string
      */
     public function getNamespace();
 
@@ -78,7 +65,7 @@ interface BundleInterface extends ContainerAwareInterface
      *
      * The path should always be returned as a Unix path (with /).
      *
-     * @return string The Bundle absolute path
+     * @return string
      */
     public function getPath();
 }