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

tests/CreatesApplication.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace Tests;
+
+use Illuminate\Contracts\Console\Kernel;
+
+trait CreatesApplication
+{
+    /**
+     * Creates the application.
+     *
+     * @return \Illuminate\Foundation\Application
+     */
+    public function createApplication()
+    {
+        $app = require __DIR__.'/../bootstrap/app.php';
+        $app->make(Kernel::class)->bootstrap();
+        return $app;
+    }
+}