declare type for arguments of anonymous functions for v2.7

Author: DQNEO

Command/DebugCommand.php

@@ -199,7 +199,7 @@ private function getMetadata($type, $entity)
             }
 
             // format args
-            $args = array_map(function ($param) {
+            $args = array_map(function (\ReflectionParameter $param) {
                 if ($param->isDefaultValueAvailable()) {
                     return $param->getName().' = '.json_encode($param->getDefaultValue());
                 }