replace boolean flags with bit flags

DataFixtures/Dumper/YamlDataDumper.php

@@ -27,8 +27,7 @@ protected function transformArrayToData($data)
             $data,
             $inline = 3,
             $indent = 4,
-            $exceptionOnInvalidType = false,
-            $objectSupport = true
+            $flags = Yaml::DUMP_OBJECT
         );
     }
 }