- The lock files are now versioned to ease transitions for lock file format changes, with warnings being displayed on incompatibility detection ([#2695](https://github.com/python-poetry/poetry/pull/2695)).
- The `init` and `new` commands will now provide hints on invalid given licenses ([#1634](https://github.com/python-poetry/poetry/pull/1634)).
### Fixed
- Fixed error messages when the authors specified in the `pyproject.toml` file are invalid ([#2525](https://github.com/python-poetry/poetry/pull/2525)).
- Fixed empty `.venv` directories being deleted ([#2064](https://github.com/python-poetry/poetry/pull/2064)).
- Fixed the `shell` command for `tcsh` shells ([#2583](https://github.com/python-poetry/poetry/pull/2583)).
- Fixed errors when installing directory or file dependencies in some cases ([#2582](https://github.com/python-poetry/poetry/pull/2582)).