Marbles

* Add support for Python 3.12, remove 3.8
* Handle assertion failures inside `setUp()`/`tearDown()`

* Update to support Python 3.10 and 3.11, and Pandas 2.x

* Add a distutils command for marbles
* Update to support Python 3.8 and Pandas 1.0

- Enable users to write indented triple-quoted notes in source
- Pin semantic-version (to avoid incompatibility with releases)
- Update flake8 per-file-ignores to use built-in ignores

* Adds python3.7 support
* Improves display of multiline locals