Merge branch '4.4'

* 4.4:
  cs fix
  Fix return statements
  [TwigBridge] add missing dep
  Add type declarations to private DefaultChoiceListFactory methods
  Add false type to ChoiceListFactoryInterface::createView $label argument
  Update UPGRADE guide of 4.3 for EventDispatcher
  [SecurityBundle] display the correct class name on the deprecated notice

Author: nicolas-grekas

Parser/TokenStream.php

@@ -155,7 +155,7 @@ public function getNextIdentifierOrStar()
         }
 
         if ($next->isDelimiter(['*'])) {
-            return;
+            return null;
         }
 
         throw SyntaxErrorException::unexpectedToken('identifier or "*"', $next);