Automated Project Update Bot fixes

Relates to #3435174. This merge request was automatically created by the Project Update Bot. It contains the changes from run 11-477325.

src/EventSubscriber/CheckTwofactorSubscriber.php

@@ -25,7 +25,7 @@ class CheckTwofactorSubscriber implements EventSubscriberInterface {
   /**
    * {@inheritdoc}
    */
-  static function getSubscribedEvents() {
+  static function getSubscribedEvents(): array {
     $events[KernelEvents::REQUEST][] = array('checkTwofactor');
     return $events;
   }