- Replace `tool.versioningit.onbuild` hook with a custom implementation
which replaces the entire `streamlink._version` module (similar to
before) and which additionally removes `versioningit` from the
`build-system.requires` field in `pyproject.toml` and which sets
a static version string in `setup.py`
- Rewrite `streamlink._version` module
- Add and update comments
- Update docs
- Add tests
- Add custom build backend which overrides certain hooks
- Include custom build backend in sdists via `MANIFEST.in`
- Remove `build>=1.0.0` workaround from `build-and-sign.sh`
- Add build backend tests, update order of tests and coverage config
bastimeyer