title: Moya: Getting -999 (Aborted) errors
body: <p>I'm using RxMoya and see a lot of -999 errors in my console. But data seems to be there.</p>
  
  <p>I have seen that provider needs a strong reference and to check that I added a deeinit in MoyaProvider. But it never gets called. What could cause the -999 (Aborted)</p>
  
  <pre><code>myApp[92741:5981476] Task &lt;40FD9BEF-D7A5-48F8-8569-1FEB342B4025&gt;.&lt;6&gt; load failed with error Error Domain=NSURLErrorDomain Code=-999 "cancelled" UserInfo={NSErrorFailingURLStringKey=https://mywebserice.com, NSErrorFailingURLKey=https://mywebserice.com, _NSURLErrorRelatedURLSessionTaskErrorKey=(
      "LocalDataTask &lt;40FD9BEF-D7A5-48F8-8569-1FEB342B4025&gt;.&lt;6&gt;"
  ), _NSURLErrorFailingURLSessionTaskErrorKey=LocalDataTask &lt;40FD9BEF-D7A5-48F8-8569-1FEB342B4025&gt;.&lt;6&gt;, NSLocalizedDescription=cancelled} [-999]
  </code></pre>