Renum

- bump minimum Python to 3.9
- renum never actually supported <3.9
- move classmethods to RenumType
- add `__getattr__` passthroughs
- RenumType -> regex.Pattern
- renum -> regex.Match
- `renum.pyi` mocks inheritance to typecheck properly

**Full Changelog**: https://github.com/Zephyrkul/renum/compare/0.0.1b0...0.0.1b1

- Swapped to [regex](https://pypi.org/project/regex/)
- Moved `.pattern` to metaclass
- Exported metaclass as `RenumType`

**Full Changelog**: https://github.com/Zephyrkul/renum/compare/0.0.1a1...0.0.1b0

Makes `renum` instances object-based rather than str-based

**Full Changelog**: https://github.com/Zephyrkul/renum/compare/0.0.1a...0.0.1a1

initial alpha release