Fix ECS

Author: Nicolas Kroll

src/Controller/Action/Admin/RetrievePackageInfoAction.php

@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace BitBag\SyliusCmsPlugin\Controller\Action\Admin;
 
 use Symfony\Component\HttpFoundation\Response;