Disable rector parallel

Author: paulbalandan

rector.php

@@ -60,7 +60,7 @@
         PHPUnitSetList::REMOVE_MOCKS,
     ]);
 
-    $rectorConfig->parallel();
+    $rectorConfig->disableParallel();
 
     // paths to refactor; solid alternative to CLI arguments
     $rectorConfig->paths([__DIR__ . '/app', __DIR__ . '/system', __DIR__ . '/tests', __DIR__ . '/utils']);