Unhandled Exception within PollingXHR.Create's Task.Run()

[hideflolife]

Perhaps as a result of ping failures (Issue #43) and subsequent socket close/disconnect, my client application using EngineIoClientDotNet v1.0.3 will see a System.Net.WebException ('The remote server returned an error: (400) Bad Request').

I don't know code well enough but thought a try-catch for AggregateExceptions might mitigate some of these unexpected exceptions.