Test against Python "3.13-dev"

[simonw]

Refs:

• Test fail against Python 3.13-dev with a Pint error #2320

---

📚 Documentation preview 📚: https://datasette--2321.org.readthedocs.build/en/2321/

[simonw]

Confirmed an error with Pint:

/opt/hostedtoolcache/Python/3.13.0-alpha.6/x64/lib/python3.13/site-packages/pint/delegates/txt_defparser/common.py:21: in <module>
    @dataclass(frozen=True)
/opt/hostedtoolcache/Python/3.13.0-alpha.6/x64/lib/python3.13/dataclasses.py:1289: in wrap
    return _process_class(cls, init, repr, eq, order, unsafe_hash,
/opt/hostedtoolcache/Python/3.13.0-alpha.6/x64/lib/python3.13/dataclasses.py:1044: in _process_class
    raise TypeError('cannot inherit frozen dataclass from a '
E   TypeError: cannot inherit frozen dataclass from a non-frozen one

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.73%. Comparing base (7d6d471) to head (225a264).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2321   +/-   ##
=======================================
  Coverage   92.73%   92.73%           
=======================================
  Files          41       41           
  Lines        6397     6397           
=======================================
  Hits         5932     5932           
  Misses        465      465           

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