Recording ErrorResponse in Connector Client

[arlandism]

Hello! Thanks for maintaining this awesome library. It's been very productive for our team.

I stumbled on something while using it. When requests are made using the connector client (here, for example), the library is only checking whether the response is a 2xx status code and returning a custom error if not. There's some Microsoft documentation that indicates the presence of an ErrorResponse object in the response body and it would be nice to have that for debugging purposes.

It would be pretty easy to integrate into the HtErr field of theHTTPError type. I'm happy to submit a pull request for this.