Publishes the language file to the langPath

Following Laravel recommendations: https://laravel.com/docs/master/packages#publishing-language-files

src/StageFrontServiceProvider.php

@@ -98,7 +98,7 @@ protected function registerPublishableFiles()
         ], 'views');
 
         $this->publishes([
-            __DIR__."/../resources/lang" =>  resource_path("lang/vendor/{$this->name}"),
+            __DIR__."/../resources/lang" =>  $this->app->langPath("vendor/{$this->name"),
         ], 'lang');
     }