IOS: Error is not reported when server return error status code

[vakrilov]

Steps to reproduce

1. Start the test server - npm start
2. Run the test app (examples/SimpleBackgroundHttp) in ios
3. Click erro-up button

Result: The upload starts, when it reaches 25% the server reports an error but the plugin shows the task as completed
Expected: The status of the task should be error

[Melf11]

i got the same issue.

[labordem]

Me too.