chore: add 3.13 classifier and test

[henryiii]

Adding 3.13, which was released today.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.77%. Comparing base (d5bcb8e) to head (17a8088).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #262   +/-   ##
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  Coverage   91.77%   91.77%           
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  Files           2        2           
  Lines         304      304           
  Branches       81       81           
=======================================
  Hits          279      279           
  Misses         17       17           
  Partials        8        8           

Flag	Coverage Δ
unittests-3.10	91.44% <ø> (ø)
unittests-3.11	91.44% <ø> (ø)
unittests-3.12	91.44% <ø> (ø)
unittests-3.13	91.44% <ø> (?)
unittests-3.8	91.44% <ø> (ø)
unittests-3.9	91.44% <ø> (ø)

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[APN-Pucky]

@henryiii Do you think lint.yml and publish-package.yml should also already change to python-version: '3.13'?

[henryiii]

That needs a bit more time, IMO, since GHA needs to start providing builds of 3.13.0 in the runner images so that they are fast. Currently it has to download, which takes a few extra seconds. (You can use "3.x", which should get the latest version present).

[henryiii]

It would be good to get patch release in the near future with the classifier since 3.13 is out! ;)