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-foundation/Session/Storage/Handler/StrictSessionHandler.php

@@ -24,15 +24,16 @@ class StrictSessionHandler extends AbstractSessionHandler
     public function __construct(\SessionHandlerInterface $handler)
     {
         if ($handler instanceof \SessionUpdateTimestampHandlerInterface) {
-            throw new \LogicException(sprintf('"%s" is already an instance of "SessionUpdateTimestampHandlerInterface", you cannot wrap it with "%s".', \get_class($handler), self::class));
+            throw new \LogicException(sprintf('"%s" is already an instance of "SessionUpdateTimestampHandlerInterface", you cannot wrap it with "%s".', get_debug_type($handler), self::class));
         }
 
         $this->handler = $handler;
     }
 
     /**
-     * {@inheritdoc}
+     * @return bool
      */
+    #[\ReturnTypeWillChange]
     public function open($savePath, $sessionName)
     {
         parent::open($savePath, $sessionName);
@@ -43,14 +44,15 @@ class StrictSessionHandler extends AbstractSessionHandler
     /**
      * {@inheritdoc}
      */
-    protected function doRead($sessionId)
+    protected function doRead(string $sessionId)
     {
         return $this->handler->read($sessionId);
     }
 
     /**
-     * {@inheritdoc}
+     * @return bool
      */
+    #[\ReturnTypeWillChange]
     public function updateTimestamp($sessionId, $data)
     {
         return $this->write($sessionId, $data);
@@ -59,14 +61,15 @@ class StrictSessionHandler extends AbstractSessionHandler
     /**
      * {@inheritdoc}
      */
-    protected function doWrite($sessionId, $data)
+    protected function doWrite(string $sessionId, string $data)
     {
         return $this->handler->write($sessionId, $data);
     }
 
     /**
-     * {@inheritdoc}
+     * @return bool
      */
+    #[\ReturnTypeWillChange]
     public function destroy($sessionId)
     {
         $this->doDestroy = true;
@@ -78,7 +81,7 @@ class StrictSessionHandler extends AbstractSessionHandler
     /**
      * {@inheritdoc}
      */
-    protected function doDestroy($sessionId)
+    protected function doDestroy(string $sessionId)
     {
         $this->doDestroy = false;
 
@@ -86,16 +89,18 @@ class StrictSessionHandler extends AbstractSessionHandler
     }
 
     /**
-     * {@inheritdoc}
+     * @return bool
      */
+    #[\ReturnTypeWillChange]
     public function close()
     {
         return $this->handler->close();
     }
 
     /**
-     * @return bool
+     * @return int|false
      */
+    #[\ReturnTypeWillChange]
     public function gc($maxlifetime)
     {
         return $this->handler->gc($maxlifetime);