Subscription testing

Plugin.php

@@ -6,6 +6,7 @@ use App;
 use Config;
 use Illuminate\Foundation\AliasLoader;
 use GermanAirlinesVa\Graphql\Classes\GraphqlServiceProvider;
+use Nuwave\Lighthouse\Subscriptions\SubscriptionServiceProvider;
 
 class Plugin extends PluginBase
 {
@@ -34,6 +35,7 @@ class Plugin extends PluginBase
     App::make('October\Rain\Support\ClassLoader')->addDirectories('graphql');
     $this->bootPackages();
     App::register(GraphqlServiceProvider::class);
+    App::register(SubscriptionServiceProvider::class);
   }
 
   public function bootPackages()