chore: style fixes

Co-authored-by: atymic <atymic@users.noreply.github.com>

Author: atymic

src/PusherChannel.php

@@ -16,7 +16,7 @@ class PusherChannel
      * @var string
      */
     const INTERESTS = 'interests';
-    
+
     /**
      * @var PushNotifications
      */