URL compatibility with httpx

[snowman2]

aws-requests-auth/aws_requests_auth/aws_auth.py

Line 195 in 2e1dd0f

parsedurl = urlparse(r.url)

https://www.python-httpx.org/compatibility/#request-urls

Accessing response.url will return a URL instance, rather than a string.
Use str(response.url) if you need a string instance.

[snowman2]

Related: #50

[pk5ls20]

Based on the ideas from this repository and referencing the official documentation, I have completely rewritten a version for httpx authentication. The code is available here: https://gist.github.com/pk5ls20/3081ac14286842da31fdf187bbd5ffef