This release implements the new [FSRS-5](https://github.com/open-spaced-repetition/fsrs4anki/wiki/The-Algorithm#fsrs-5) scheduler algorithm.
FSRS-5 now uses 19 parameters instead of 17, so if you were previously setting your own custom parameters you must do one of the following to upgrade:
1. Optimize again with an FSRS-5 optimizer to get a new set of FSRS-5 weights
- You can choose from the following three currently available optimizers: [fsrs-optimizer](https://github.com/open-spaced-repetition/fsrs-optimizer), [fsrs-rs](https://github.com/open-spaced-repetition/fsrs-rs) or [fsrs-browser](https://github.com/open-spaced-repetition/fsrs-browser)
- Additionally, you can also wait till the next Anki release when the FSRS-5 optimizer will be included as a new feature
2. Keep your previous weights, but set the two new parameters equal to 0 (`w[17]=0, w[18]=0`)
3. Or simply revert to using default parameters for now
What's Changed
* modify readme and contributing for Ruff addition+ run ruff formatter by joshdavham in https://github.com/open-spaced-repetition/py-fsrs/pull/50
* mypy contributing by joshdavham in https://github.com/open-spaced-repetition/py-fsrs/pull/51
* FSRS-5 by joshdavham in https://github.com/open-spaced-repetition/py-fsrs/pull/52
**Full Changelog**: https://github.com/open-spaced-repetition/py-fsrs/compare/v2.5.1...v3.0.0