v1.0.1: Http Error Hint Additions + Blob Test Fixes (#246)

* Add 401 and ensure status code and hint are always returned for errors

* Patch bump

* Forgot to install black precommit locally on this system

* Make 401 clear and give response text

* Correct for empty response/ 400s

* Handle excel response process

* Ensure correct mime_type is sent even if OS does not have it in guess_types

* Correct issue for tests with static json response in hint in favor of getattr