features
- improved some docstrings
- added `validate_date_column` [here](https://github.com/brunorosilva/plotly-calplot/blob/caabe67556d284dbe5f7f1a25e21792ad4f8178c/plotly_calplot/utils.py#L38) in order to address 26 , now the code accepts tz aware dates, string dates (given the date_fmt) or plain datetime from `pd.to_datetime`
fixes
- fix the deployment pipeline to test pypi and pypi
- add Union so mypy can run its tests
- remove `start_month` and `end_month` from `get_date_coordinates`, it was not necessary
- remove the pandas 1.x dependency to any addressing 27
**Full Changelog**: https://github.com/brunorosilva/plotly-calplot/compare/v0.1.16...v0.1.20