What's Changed
* Drop references to finished processes in local manager by xadrianzetx in https://github.com/xadrianzetx/optuna-distributed/pull/90
* Bump version to `0.7.0` by xadrianzetx in https://github.com/xadrianzetx/optuna-distributed/pull/91
**Full Changelog**: https://github.com/xadrianzetx/optuna-distributed/compare/v0.6.2...v0.7.0