Bump pycodestyle from 2.8.0 to 2.9.0

Bumps [pycodestyle](https://github.com/PyCQA/pycodestyle) from 2.8.0 to 2.9.0.
- [Release notes](https://github.com/PyCQA/pycodestyle/releases)
- [Changelog](https://github.com/PyCQA/pycodestyle/blob/main/CHANGES.txt)
- [Commits](PyCQA/pycodestyle@2.8.0...2.9.0)

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

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

requirements.txt

@@ -8,7 +8,7 @@ pytest==6.2.4
 pytest-runner==5.3.1
 pytest-asyncio==0.15.1
 coveralls==3.3.1
-pycodestyle==2.8.0
+pycodestyle==2.9.0
 sphinx-rtd-theme==1.0.0
 sphinx==4.5.0
 mypy==0.942