Bump astroid from 2.8.5 to 2.9.0

Bumps [astroid](https://github.com/PyCQA/astroid) from 2.8.5 to 2.9.0.
- [Release notes](https://github.com/PyCQA/astroid/releases)
- [Changelog](https://github.com/PyCQA/astroid/blob/main/ChangeLog)
- [Commits](https://github.com/PyCQA/astroid/compare/v2.8.5...v2.9.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -1,5 +1,5 @@
 asgiref==3.4.1
-astroid==2.8.5
+astroid==2.9.0
 cachetools==4.2.4
 certifi==2021.10.8
 chardet==4.0.0