v0.3

What's Changed

• Citation file by @rlskoeser in #70
• Reorganize and improve documentation by @rlskoeser in #81
• Add example usage to the readme #75 by @rlskoeser in #82
• Check notebooks in CI check workflow #76 by @rlskoeser in #83
• Configure mypy pre-commit check by @rlskoeser in #91
• Consolidate setup.cfg and pyproject.toml; drop tox; revamp sphinx docs by @rlskoeser in #88
• Update contributor documentation with branching guidelines by @rlskoeser in #94
• Revise optional dependency groups so dev implies test by @rlskoeser in #96
• Test against python 3.13 by @rlskoeser in #97
• Use numpy datetime64 instead of datetime.date #77 by @rlskoeser in #84
• Make EDTF parser available as undate formatter; handle 5+ digit years by @rlskoeser in #89
• preliminary str parse and format methods by @rlskoeser in #90
• Rename formatters submodule and classes to converters by @rlskoeser in #101
• EDTF demo/validation notebook by @rlskoeser in #98

Full Changelog: 0.2...0.3