Update supported Python versions

[jaseemabid]

Heya 👋🏼

I noticed that the supported Python version in the README.md doesn't
match the reality in test config, so I updated the supported list to
currently maintained Python versions.

See the list here: https://endoflife.date/python

I also noticed that the general tooling is also a bit outdated; the
various setup.py, setup.cfg, MANIFEST.in, requirements.txt etc which can
all be replaced with a pyproject.toml + something like uv/poetry.

If there is general appetite from the maintainers, happy to send some
follow up PRs to make this a bit better.

[tomplus]

Thanks for your contribution. Please keep old versions of Python. Even if they have stopped maintaining them, there is a chance that someone may use it in some legacy environments.

[jaseemabid]

@tomplus What's the lowest version you would like to support? I'll make sure that the README, metadata. CI and tests are in sync.

I picked 3.10 as it is the oldest version with security support at this point.

[tomplus]

Python 3.8

[jaseemabid]

Updated the PR to support 3.8+.

Just so that we are on the same page, 3.8 doesn't get security fixes anymore. https://devguide.python.org/versions/

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 27.07%. Comparing base (96f115e) to head (3371df8).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #375   +/-   ##
=======================================
  Coverage   27.07%   27.07%           
=======================================
  Files         879      879           
  Lines      107872   107872           
=======================================
  Hits        29207    29207           
  Misses      78665    78665           

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[tomplus]

Thanks!