making queueable jobs work with 5.3

src/Feature.php

@@ -49,12 +49,8 @@ public function run($job, $arguments = [], $extra = [])
      *
      * @return mixed
      */
-    public function runInQueue($job, $arguments, Queue $queue = null)
+    public function runInQueue($job, array $arguments = [], $queue = 'default')
     {
-        if (!$queue) {
-            $queue = DefaultQueue::class;
-        }
-
         // instantiate and queue the job
         $reflection = new ReflectionClass($job);
         $jobInstance = $reflection->newInstanceArgs($arguments);

src/QueueableJob.php

@@ -5,6 +5,7 @@
 use Illuminate\Queue\SerializesModels;
 use Illuminate\Queue\InteractsWithQueue;
 use Illuminate\Contracts\Queue\ShouldQueue;
+use Illuminate\Bus\Queueable;
 
 /**
  * An abstract Job that can be managed with a queue
@@ -14,4 +15,5 @@ class QueueableJob extends Job implements ShouldQueue
 {
     use SerializesModels;
     use InteractsWithQueue;
+    use Queueable;
 }