Fix type issue

Author: marcgeurts

src/Query/Operation/OperationInterface.php

@@ -26,7 +26,7 @@ public function delete(): QueryInterface;
     public function filter(array $predicate): OperationInterface;
 
     /**
-     * @param array $keys
+     * @param int|string|array $keys
      * @return OperationInterface
      */
     public function getAll(...$keys): OperationInterface;