Fsrs-optimizer

What's Changed
* Fixed some issues with Brent by Expertium in https://github.com/open-spaced-repetition/fsrs-optimizer/pull/163


**Full Changelog**: https://github.com/open-spaced-repetition/fsrs-optimizer/compare/v5.7.1...v5.7.2

What's Changed
* Feat/expose gamma to optimizer.train() by L-M-Sherlock in https://github.com/open-spaced-repetition/fsrs-optimizer/pull/162


**Full Changelog**: https://github.com/open-spaced-repetition/fsrs-optimizer/compare/v5.7.0...v5.7.1

What's Changed
* Expt/regularization of parameters by L-M-Sherlock in https://github.com/open-spaced-repetition/fsrs-optimizer/pull/157
* Feat/add fuzz option to simulator by L-M-Sherlock in https://github.com/open-spaced-repetition/fsrs-optimizer/pull/160


**Full Changelog**: https://github.com/open-spaced-repetition/fsrs-optimizer/compare/v5.6.5...v5.7.0

What's Changed
* Fix/fallback to 1 when weights doesn't exist & create "tensor" if it doesn't exist during evaluation by L-M-Sherlock in https://github.com/open-spaced-repetition/fsrs-optimizer/pull/159


**Full Changelog**: https://github.com/open-spaced-repetition/fsrs-optimizer/compare/v5.6.4...v5.6.5

What's Changed
* Fine tuned w1 and w2 for pretraining by L-M-Sherlock in https://github.com/open-spaced-repetition/fsrs-optimizer/pull/158


**Full Changelog**: https://github.com/open-spaced-repetition/fsrs-optimizer/compare/v5.6.3...v5.6.4

What's Changed
* Fix/S0 dataset initialization fallback by L-M-Sherlock in https://github.com/open-spaced-repetition/fsrs-optimizer/pull/156


**Full Changelog**: https://github.com/open-spaced-repetition/fsrs-optimizer/compare/v5.6.2...v5.6.3