Changed

• Require virtualenv<20.33 to work around an issue where Poetry uses the wrong Python version (#10491).
• Improve the error messages for the validation of the pyproject.toml file (#10471).

Fixed

• Fix an issue where project plugins were installed even though poetry install was called with --no-plugins (#10405).
• Fix an issue where dependency resolution failed for self-referential extras with duplicate dependencies (#10488).

Docs

• Clarify how to include files that were automatically excluded via VCS ignore settings (#10442).
• Clarify the behavior of poetry add if no version constraint is explicitly specified (#10445).