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

Data/Generator/LocaleDataGenerator.php

@@ -79,7 +79,7 @@ protected function generateDataForLocale(BundleEntryReaderInterface $reader, str
         // Don't generate aliases, as they are resolved during runtime
         // Unless an alias is needed as fallback for de-duplication purposes
         if (isset($this->localeAliases[$displayLocale]) && !$this->generatingFallback) {
-            return;
+            return null;
         }
 
         // Generate locale names for all locales that have translations in
@@ -124,7 +124,7 @@ protected function generateDataForLocale(BundleEntryReaderInterface $reader, str
             $data['Names'] = array_diff($data['Names'], $fallbackData['Names']);
         }
         if (!$data['Names']) {
-            return;
+            return null;
         }
 
         return $data;

Util/Version.php

@@ -79,7 +79,7 @@ public static function normalize(string $version, ?int $precision)
         }
 
         if (!preg_match('/^'.$pattern.'/', $version, $matches)) {
-            return;
+            return null;
         }
 
         return $matches[0];