bump symfony to 5.4.21

adapt to the new EventDispatcher API
  - Symfony\Component\EventDispatcher => Symfony\Contracts\EventDispatcher
  - dispatch() arguments swap
  - execute() must return int

app/Core/User/UserProfile.php

@@ -59,7 +59,7 @@ class UserProfile extends Base
 
         if (! empty($profile) && $profile['is_active'] == 1) {
             $this->userSession->initialize($profile);
-            $this->dispatcher->dispatch(self::EVENT_USER_PROFILE_AFTER_SYNC, new UserProfileSyncEvent($profile, $user));
+            $this->dispatcher->dispatch(new UserProfileSyncEvent($profile, $user), self::EVENT_USER_PROFILE_AFTER_SYNC);
             return true;
         }