undate python library

Changes in version 0.7 Add parsing to Gregorian date converter; supports month names (full or abbreviated) in English, French, German, Spanish, Kinyarwanda, Ganda, and Tigrinya Add support for parsing Christian liturgical dates (fixed holidays and movable feasts) Include Gregorian dates and holidays in omnibus parser Updates to pyproject.toml, pre-commit hooks, ruff rules, dependabot configuration What's Changed (auto-generated) Add support for parsing Gregorian dates in standard text formats by @rlskoeser in github.com Add grammar & converter for Christian holidays by @rlskoeser in github.com Updates based on repo-review report by @rlskoeser in github.com Update README.md by @rlskoeser in github.com Full Changelog: github.com If you use this software, please cite it using these metadata.