Merge branch '5.1' into 5.2

* 5.1:
  Rename parameter of @method configureContainer
  [DependencyInjection] Support PHP 8 builtin types in CheckTypeDeclarationsPass
  [DependencyInjection] Fix InvalidParameterTypeException for function parameters
  [Notifier] Cleanup changelog (5.1)
  [VarDumper] fix mutating $GLOBALS while cloning it

Author: nicolas-grekas

CHANGELOG.md

@@ -22,7 +22,6 @@ CHANGELOG
 5.1.0
 -----
 
- * Added the Mattermost notifier bridge
  * [BC BREAK] The `ChatMessage::fromNotification()` method's `$recipient` and `$transport`
    arguments were removed.
  * [BC BREAK] The `EmailMessage::fromNotification()` and `SmsMessage::fromNotification()`