Update to Python v3.13

[alexdewar]

Description

There seems like no better time to do this. I've done some manual testing with Python 3.13 and everything still seems to work as expected (except for the bug fixed in #750).

Type of change

• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Documentation (non-breaking change that adds or improves the documentation)
• Optimisation (non-breaking, back-end change that speeds up the code)

Key checklist

• Pre-commit hooks run successfully (pre-commit run -a)
• All tests pass (pytest)
• The documentation builds without warnings (mkdocs build -s)
• Check the GUI still works (if relevant)
• Check the code works with actual hardware (if relevant)
• Check the pyinstaller-built executable works (if relevant)

Further checks

• Code is commented, particularly in hard-to-understand areas
• Tests have been added or an issue has been opened to tackle that in the future. (Indicate issue here: # (issue))

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.94%. Comparing base (6680116) to head (6c89208).
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #751   +/-   ##
=======================================
  Coverage   86.94%   86.94%           
=======================================
  Files          69       69           
  Lines        3561     3561           
=======================================
  Hits         3096     3096           
  Misses        465      465           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[dalonsoa]

If it works, all good! I guess not tested in a real system, right? I'm just a bit worried because of the serial library...

[alexdewar]

Nope, just with dummy devices 😞.

I'd be happier if it were tested on the real hardware too, but as we won't have access to it for a while, I think it's probably just ok to merge it and fix things later if needed. Jon has offered to do some testing in the meantime -- I'll make an rc release to send him.

I have checked and no one's complaining about PySerial not working on Python 3.13, so that's something.