Changes

• Add official support for Python 3.13.
• Drop support for Python 3.9. Refs {issue}787.
• Add dependency on extra-platforms. Closes {issue}784.
• Run tests on stable Python 3.13 release.
• Run tests on Python 3.14-dev, mark them as unstable.
• Move macos-14 tests to macos-15.
• Add tests on ubuntu-24.04. Remove tests on ubuntu-20.04.
• Run workflows on ubuntu-24.04.
• Rely on frozen uv.lock for reproducibility.

🐍 Available on PyPi.