Update poetry to 2.1.0

[pyup-bot]

This PR updates poetry from 1.8.3 to 2.1.0.

Changelog

2.1.0

Features & Improvements

- Added support for Python 3.12 [379](https://github.com/python-poetry/cleo/pull/379)
- Added `CONTRIBUTING.md` document [331](https://github.com/python-poetry/cleo/pull/331)
- Added `tests/` directory to sdist artifact [327](https://github.com/python-poetry/cleo/pull/327)

Bug fixes

- Fixed subcommand completions for Fish [359](https://github.com/python-poetry/cleo/pull/359)
- Removed deprecated `-A` option from Fish completions [366](https://github.com/python-poetry/cleo/pull/366)
- Fixed program name discovery in completions script when running as module [231](https://github.com/python-poetry/cleo/pull/231)
- Fixed ANSI coloring detection in virtual terminal environments (Windows, PyCharm) [104](https://github.com/python-poetry/cleo/pull/104)
- Fixed terminal size detection [299](https://github.com/python-poetry/cleo/pull/299)

Links

• PyPI: https://pypi.org/project/poetry
• Changelog: https://data.safetycli.com/changelogs/poetry/

[pyup-bot]

Closing this in favor of #466