• I have searched the issues of this repo and believe that this is not a duplicate.
• I have searched the documentation and believe that my question is not covered.

Feature Request

The documentation mentions "The --dev-only option is now deprecated. You should use the --only dev notation instead." (https://python-poetry.org/docs/master/cli/)

However, this functionality is not actually available in poetry 1.1.11 (see poetry install --help). It would be great if you could bring it back (there have been other issues related to this).