Enh: Continuous integration #1
Description
The project needs continuous integration. Some milestone:
- Enforce PEP8, Black, or equivalent.
- Ensure code coverage (50% to check this box; further improvement will have to be ongoing).
- Ensure notebooks are run as part of the test base.
- Automatically push on PyPI new releases
- Automatically build as Sphynx (or similar) documentation and push on PR