Damm32

- Add sphinx docstrings
- Fix constructor not using alphabet argument (13)
- Remove redundant type aliases
- Improve exception messages
- Improve alphabet validation

- Dropped support for Python 3.4 and 3.5
- Minor refactor
- Include `__version__` in module

- Added PEP561 Marker
- Improve Typing

- Test against multiple Python versions
- Use __all__
- More docstrings
- Codeclimate

- Increased test coverage to 100%
- Better formatting of code throughout
- Switched to using Poetry instead of Pipenv

- Updated README to be more helpful
- Fixed a type issue on the calculate function