Xocto

- Include py.typed files in package data to restore correct type checking [127](https://github.com/octoenergy/xocto/pull/127)

- Modernize setup to use pyproject.toml [116](https://github.com/octoenergy/xocto/pull/116)
- Populate `xocto.__version__` from package metadata
- Enables `FiniteDateRange` to be unioned with more than two ranges [123](https://github.com/octoenergy/xocto/pull/123)

- Fix docs by adding missing rtd theme [115](https://github.com/octoenergy/xocto/pull/113)
- Adding explicit type for Optional OneToOneField [113](https://github.com/octoenergy/xocto/pull/113)
- Fix `OverflowError` when calling `is_disjoint` on a range containing `date.min` or `date.max` [112](https://github.com/octoenergy/xocto/pull/112)
- Improve autodoc of callables and variables [111](https://github.com/octoenergy/xocto/pull/111)

🎃 Happy Halloween! 🎃

- Adding explicit type for Optional Foreign Key [108](https://github.com/octoenergy/xocto/pull/108)

- Fix erroneously narrow typehinting in localtime module [106](https://github.com/octoenergy/xocto/pull/106)
- Fix ValueError bug when trying to intersect adjacent FiniteDateRanges [105](https://github.com/octoenergy/xocto/pull/105)

- Upgrade duckdb package to version 0.9.0[104](https://github.com/octoenergy/xocto/pull/104)