v0.19.0

What's Changed

• Fix CI error by updating rust libraries by @c-bata in #1074
• Fix duration calculation logic in TrialListDetail by @hrntsm in #1070
• Move PlotlyColorTemplate to tslib by @hrntsm in #1069
• Fix FutureWarning of system attrs in preferential optimization by @ro1205 in #1078
• Fix deprecation warning by replacing JournalFileStorage with JournalFileBackend by @msdsm in #1077
• Fix categorical plot tick values by @hrntsm in #1071
• Remove redundant type declarations by @c-bata in #1082
• Migrate to ruff from black/isort/flake8 by @c-bata in #1084
• Remove optuna-fast-fanova from codebases by @c-bata in #1085
• Update dependencies used in devcontainer by @c-bata in #1086
• Update how to release the new version by @c-bata in #1088
• Bump version to 0.19.0 by @c-bata in #1087

New Contributors

• @ro1205 made their first contribution in #1078
• @msdsm made their first contribution in #1077

Full Changelog: v0.18.0...v0.19.0