Merge pull request #123 from kufi/patch-2

Added missing use

Author: loostro

Form/EventListener/SingleUploadSubscriber.php

@@ -5,6 +5,7 @@
 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
 use Symfony\Component\Form\FormEvent;
 use Symfony\Component\Form\FormEvents;
+use Symfony\Component\Form\ResolvedFormTypeInterface;
 
 /**
  * @author Piotr Gołębiewski <[email protected]>