Fsrs

What's Changed
* Use lower case for attribute in SchedulingInfo by vanicat in https://github.com/open-spaced-repetition/py-fsrs/pull/36
* update README.md by joshdavham in https://github.com/open-spaced-repetition/py-fsrs/pull/37
* add default argument to repeat function by joshdavham in https://github.com/open-spaced-repetition/py-fsrs/pull/38

New Contributors
* vanicat made their first contribution in https://github.com/open-spaced-repetition/py-fsrs/pull/36

**Full Changelog**: https://github.com/open-spaced-repetition/py-fsrs/compare/v2.1.1...v2.2.0

What's Changed
* fix timezone error by T2XX in https://github.com/open-spaced-repetition/py-fsrs/pull/34

New Contributors
* T2XX made their first contribution in https://github.com/open-spaced-repetition/py-fsrs/pull/34

**Full Changelog**: https://github.com/open-spaced-repetition/py-fsrs/compare/v2.1.0...v2.1.1

What's Changed
* v2.1.0 - make Card objects JSON serializable by joshdavham in https://github.com/open-spaced-repetition/py-fsrs/pull/33


**Full Changelog**: https://github.com/open-spaced-repetition/py-fsrs/compare/v2.0.0...v2.1.0

What's Changed
* add nix by asukaminato0721 in https://github.com/open-spaced-repetition/fsrs-rs/pull/280
* Feat/support load balance in simulator by L-M-Sherlock in https://github.com/open-spaced-repetition/fsrs-rs/pull/281


**Full Changelog**: https://github.com/open-spaced-repetition/fsrs-rs/compare/v2.0.3...v2.0.4

What's Changed
* add test help fn by asukaminato0721 in https://github.com/open-spaced-repetition/fsrs-rs/pull/273
* use Reverse by asukaminato0721 in https://github.com/open-spaced-repetition/fsrs-rs/pull/274
* cut ci time by asukaminato0721 in https://github.com/open-spaced-repetition/fsrs-rs/pull/277
* mention dart binding by asukaminato0721 in https://github.com/open-spaced-repetition/fsrs-rs/pull/278
* update burn to v0.16.0 by L-M-Sherlock in https://github.com/open-spaced-repetition/fsrs-rs/pull/251
* Fix/incorrect clamping of difficulty in simulator by L-M-Sherlock in https://github.com/open-spaced-repetition/fsrs-rs/pull/279


**Full Changelog**: https://github.com/open-spaced-repetition/fsrs-rs/compare/v2.0.2...v2.0.3

What's Changed
* Feat/L2 Regularization by L-M-Sherlock in https://github.com/open-spaced-repetition/fsrs-rs/pull/270


**Full Changelog**: https://github.com/open-spaced-repetition/fsrs-rs/compare/v2.0.1...v2.0.2