What's Changed
* Screen to compare the multiple studies by keisuke-umezawa in https://github.com/optuna/optuna-dashboard/pull/380
* Allow `TextInputWidget` to accept strings for user attribute forms. by c-bata in https://github.com/optuna/optuna-dashboard/pull/451
* Replace Stable UI with Experimental UI. by c-bata in https://github.com/optuna/optuna-dashboard/pull/453
* Update dependencies react-router v6 by c-bata in https://github.com/optuna/optuna-dashboard/pull/457
* Add button to fail a trial by c-bata in https://github.com/optuna/optuna-dashboard/pull/458
* Bump the version up to v0.10.0b1 by c-bata in https://github.com/optuna/optuna-dashboard/pull/454
**Full Changelog**: https://github.com/optuna/optuna-dashboard/compare/v0.9.2...v0.10.0b1