Upgrade CI Python version to >= 3.12

[brews]

CI previously ran on Python 3.10. This upgrades it to 3.12.

Close #150

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.91%. Comparing base (8c3e7c5) to head (4e950d4).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #270   +/-   ##
=======================================
  Coverage   68.91%   68.91%           
=======================================
  Files          15       15           
  Lines        1750     1750           
=======================================
  Hits         1206     1206           
  Misses        544      544           

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[brews]

Heads up to @JMGilbert @kemccusker. It's good to test on a recent version of Python. Any concerns with running CI tests on Python 3.12?

[kemccusker]

Heads up to @JMGilbert @kemccusker. It's good to test on a recent version of Python. Any concerns with running CI tests on Python 3.12?

None that I can think of, except we may pin to earlier versions of python in calling applications, but those are also pinned to earlier versions of dscim so I think it's fine.

[brews]

Thanks, @kemccusker. To be clear this doesn't make Python >= 3.12 a requirement for users installing the package. It's just the Python version CI tests on.