Build 3.12 Wheels And Update Pyproject

[mikedh]

Thanks for maintaining these bindings! I went down a slight rabbit hole trying to get Python 3.12 wheels built:

• updates cibuildwheel version to build wheels for 3.7-3.12
  • dropped 3.6 as it needs special handling (for TOML) and also has been unsupported since 2021
• moves most project info from setup.py to pyproject.toml
• adds test extra, i.e. pip install xatlas[test]
  • cibuildwheel installs this extra and runs tests on every wheel
• adds numpy as a dependency to fix import on a pip install
• updates extern/xatlas to the latest upstream commit. It doesn't look like there's been much changed.
• updated tests
  • now uses file relative paths for loading models so they can be run from any working directory.
  • returned width and height appear to not be totally deterministic or set explicitly (i.e. 1067 on x64, 996 on i686, old test was == 1057) so I just set the check to be >= 900.
  • on some platforms these tests are very very slow (220s) which on investigation is actually the test command compiling numpy. I left everything that succeeded even if it was making the matrix slow. The actual tests run very quickly.

This is currently building all wheels successfully.

[mworchel]

Thank you so much for investing the time! All changes look good to me.

Just a last question before I merge: do you have any idea, why the tests succeeded before but are failing now? This seems to be limited to x86 builds (?), have they been included before? I am wondering because non-deterministic atlas size doesn't seem like it would be intended. Maybe a bug in xatlas?

[mworchel]

Anyway, the PR is merged and version 0.0.9 is released. Thanks again.