Fsrs-optimizer

What's Changed
* Fix/Don't remove rows with mean R = 1 by user1823 in https://github.com/open-spaced-repetition/fsrs-optimizer/pull/70

New Contributors
* user1823 made their first contribution in https://github.com/open-spaced-repetition/fsrs-optimizer/pull/70

**Full Changelog**: https://github.com/open-spaced-repetition/fsrs-optimizer/compare/v4.20.3...v4.20.4

What's Changed
* Fix/use median parameters from benchmark by L-M-Sherlock in https://github.com/open-spaced-repetition/fsrs-optimizer/pull/71


**Full Changelog**: https://github.com/open-spaced-repetition/fsrs-optimizer/compare/v4.20.2...v4.20.3

What's Changed
* Fix/sqrt(count) in formula_analysis by L-M-Sherlock in https://github.com/open-spaced-repetition/fsrs-optimizer/pull/68


**Full Changelog**: https://github.com/open-spaced-repetition/fsrs-optimizer/compare/v4.20.1...v4.20.2

What's Changed
* Fix/remove outlier 5% by L-M-Sherlock in https://github.com/open-spaced-repetition/fsrs-optimizer/pull/67


**Full Changelog**: https://github.com/open-spaced-repetition/fsrs-optimizer/compare/v4.20.0...v4.20.1

What's Changed
* Feat/update default weights & flat power forgetting curve & sqrt(count) in pretrain by L-M-Sherlock in https://github.com/open-spaced-repetition/fsrs-optimizer/pull/66


**Full Changelog**: https://github.com/open-spaced-repetition/fsrs-optimizer/compare/v4.19.2...v4.20.0