Reapply "Add Python 3.13 support"

[arminfriedl]

This was already done in 27195dc but then reverted in 05504dd, presumably because the GH Action was unsuccessful.

Python 3.13 is now available in the Ubuntu base image, so the GH Action goes through just fine. So this just re-applies 27195dc.

I'd also really appreciate a new 0.6.2 release :)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (f2f7f81) to head (7c785e2).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master       #20   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            1         1           
  Lines           93        93           
  Branches        26        26           
=========================================
  Hits            93        93           

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[utapyngo]

Thank you, Python 3.13 support has already been added. What was missing is changes in setup.py.

[arminfriedl]

Ah right, thank you! And thanks a lot for the release also, will try it out tomorrow