Fix ListType item validation to accept InputObjectType

Author: portey

src/Validator/ConfigValidator/Rules/TypeValidationRule.php

@@ -48,7 +48,8 @@ public function validate($data, $ruleInfo)
                     || $data instanceof AbstractInterfaceType
                     || $data instanceof AbstractUnionType
                     || $data instanceof AbstractEnumType
-                    || $data instanceof AbstractScalarType;
+                    || $data instanceof AbstractScalarType
+                    || $data instanceof AbstractInputObjectType;
 
                 case TypeMap::TYPE_OBJECT_INPUT_TYPE:
                     return $data instanceof AbstractInputObjectType;
@@ -174,4 +175,4 @@ private function isInputField($data, $name = null)
         return false;
     }
 
-}
+}