Merge branch '5.1' into 5.x

* 5.1:
  Fix a typo on Messenger handler results example

Author: javiereguiluz

messenger/handler_results.rst

@@ -62,7 +62,7 @@ handler is registered. The ``HandleTrait`` can be used in any class that has a
         }
 
         // Creating such a method is optional, but allows type-hinting the result
-        private function query(ListItemsQuery $query): ListItemsResult
+        private function query(ListItemsQuery $query): ListItemsQueryResult
         {
             return $this->handle($query);
         }