Update depercated urllib3 methods

[Chrosea]

1. requests no longer has vendored modules in request.package,
2. urllib3 deprecated Retry options Retry(method_whitelist=...) in favor of Retry(allowed_methods=...)

[Terseus]

I'm not on my PC right now, I'll take a look on why the pipeline is failing in >3.10 whenever I can.

[Terseus]

Found the problem; I think there's a bug in vcrpy with urllib3 that prevents the test suite to work (see https://github.com/kevin1024/vcrpy/issues/719).

The jobs of Python <3.10 works because vcrpy has pinned urllib3 to v1 with Python <3.10 (see https://github.com/kevin1024/vcrpy/pull/699#issuecomment-1563082822).

Sorry but I would prefer to being able to run the test suite before merging this.

In the mean time, if anyone is having trouble with the urllib3 upgrade, pin urllib3<2 in your requirements until this is fixed.

[gl2007]

My VSCode was cribbing with this error "Import "requests.packages.urllib3.util" could not be resolved". Had to change it to "from urllib3.util" for the error to go away. I am a newbie here to py.