Merge branch '6.4' into 7.1

* 6.4:
  [AssetMapper] Fix `JavaScriptImportPathCompiler` regex for non-latin characters
  Definition::$class may not be class-string
  require Cache component versions compatible with Redis 6.1
  [Twitter][Notifier] Fix post INIT upload
  [Messenger][RateLimiter] fix additional message handled when using a rate limiter
  [Serializer] fixed object normalizer for a class with `cancel` method
  Fix bucket size reduce when previously created with bigger size

Definition.php

@@ -180,8 +180,6 @@ public function setClass(?string $class): static
 
     /**
      * Gets the service class.
-     *
-     * @return class-string|null
      */
     public function getClass(): ?string
     {