[python] New Python version 3.14 released

[frosencrantz]

New Python version 3.14 released. And 3.9 is now EOL.

See https://devguide.python.org/versions/

It might be useful to run tests on the new release.

(Similar to Python 3.13 release #2550)

[midichef]

I tried out Python 3.14 in the Github CI workflow today. It won't setup the required packages until there is a 3.14 wheel for h5py and for pyarrow. For h5py the new wheel will likely be released in the next day or so. The wheel for pyarrow will come out with Arrow 22.0.0, which ought to be 2-4 weeks.

[midichef]

update: h5py now has a wheel, so we're just waiting on pyarrow to get a wheel in the next 2-4 weeks.

Also, the rest of the visidata tests pass, except for one failure:

visidata/visidata/tests/test_path.py

Line 25 in a27f6eb

assert Path('foo.').base_stem == 'foo.'

as of Python 3.14.0, visidata.Path('foo.').base_stem has changed to 'foo' instead of 'foo.'