Get Laravel Dusk installed using PhantomJS so it can work with Travis CI easily

app/Providers/AppServiceProvider.php

@@ -5,6 +5,7 @@ namespace App\Providers;
 use App\Tag;
 use App\Note;
 use Validator;
+use Laravel\Dusk\DuskServiceProvider;
 use Illuminate\Support\ServiceProvider;
 
 class AppServiceProvider extends ServiceProvider
@@ -54,6 +55,8 @@ class AppServiceProvider extends ServiceProvider
      */
     public function register()
     {
-        //
+        if ($this->app->environment('local', 'testing')) {
+            $this->app->register(DuskServiceProvider::class);
+        }
     }
 }