Bump ruff from 0.1.9 to 0.2.1 (#881)

Bumps [ruff](https://github.com/astral-sh/ruff) from 0.1.9 to 0.2.1.
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](astral-sh/ruff@v0.1.9...v0.2.1)

---
updated-dependencies:
- dependency-name: ruff
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -14,7 +14,7 @@ twine
 
 # Tests & Linting
 coverage[toml]==7.4.1
-ruff==0.1.9
+ruff==0.2.1
 mypy==1.8.0
 trio-typing==0.10.0
 types-certifi==2021.10.8.3