build: test and advertise Python 3.12 support

[noirbizarre]

A basic pull request adding Python 3.12 to tested versions as well as proper PyPI classifiers for Python 3.12 support advertisement.

No functional changes

[codecov]

Codecov Report

Merging #1387 (a531c80) into master (23f9366) will increase coverage by 0.13%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1387      +/-   ##
==========================================
+ Coverage   97.27%   97.41%   +0.13%     
==========================================
  Files          48       48              
  Lines        4327     4327              
==========================================
+ Hits         4209     4215       +6     
+ Misses        118      112       -6     

Flag	Coverage Δ
unittests	97.41% <ø> (+0.13%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
tests/test_updatediff.py	100.00% <ø> (ø)

... and 1 file with indirect coverage changes

[sisp]

Thanks for caring about this maintenance work, @noirbizarre! 🙏

I believe you just ran poetry lock or poetry update, right? It seems only pywin32 needed an update though. I'd prefer not mixing a complete lock file update with adding support for Python 3.12. Would you mind reverting poetry.lock and trying to update only pywin32 through poetry update pywin32?

[sisp]

By the way, I think the tests are failing now because of the most recent mypy version. See also #1286 (comment).

[noirbizarre]

Yep, exactly. PR updated with minimal lock change.
Sorry for the multiple trials, I don't have other mean to test against Windows and MacOS.

[yajo]

Thanks!

[sisp]

One CI job is failing though, I'm not quite sure why. It seems to be related to the pip vendored by Python 3.12. pypa/pip#11501 looks like the same problem. I wonder why only the Ubuntu job is failing.

[noirbizarre]

I think virtualenv needed an update, so I just did poetry update virtualenv (virtualenv dependency comes from pre-commit and was the one providing the vendored pip for commitizen).
For reference, the idea comes from pre-commit/pre-commit#3041

Now CI is green 🎉

[sisp]

Perfect, thanks for investigating that problem! 👌

LGTM! 🎉 Thanks again for engaging also in this maintenance work, much appreciated! 🙏

[noirbizarre]

I try to contribute as much as possible to tools I use, even for small tasks.
Given I contribute to those tools, I benefit too from housekeeping and maintenance.
Anyway, I'm pleased to help !