Hotfix - SF 4.1 compatiblity

Author: bpolaszek

src/Resources/config/routing.xml

@@ -4,7 +4,7 @@
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://symfony.com/schema/routing http://symfony.com/schema/routing/routing-1.0.xsd">
 
-    <route id="bentools_webpush.subscription" path="" methods="POST DELETE">
+    <route id="bentools_webpush.subscription" path="/" methods="POST DELETE">
         <default key="_controller">BenTools\WebPushBundle\Action\SubscriptionAction::__invoke</default>
     </route>