Bump flake8 from 4.0.1 to 5.0.4 (#280)

Bumps [flake8](https://github.com/pycqa/flake8) from 4.0.1 to 5.0.4.
- [Release notes](https://github.com/pycqa/flake8/releases)
- [Commits](PyCQA/flake8@4.0.1...5.0.4)

---
updated-dependencies:
- dependency-name: flake8
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

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

Author: dependabot[bot]

requirements-test.txt

@@ -1,7 +1,7 @@
 bandit==1.7.4
 black==22.10.0
 bump2version==1.0.1
-flake8==4.0.1
+flake8==5.0.4
 isort==5.10.1
 mypy==0.982
 mkdocs-material==8.2.1