Bump flake8 from 5.0.3 to 5.0.4 (#343)

Bumps [flake8](https://github.com/pycqa/flake8) from 5.0.3 to 5.0.4.
- [Release notes](https://github.com/pycqa/flake8/releases)
- [Commits](PyCQA/flake8@5.0.3...5.0.4)

---
updated-dependencies:
- dependency-name: flake8
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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requirements_dev.txt

@@ -1,7 +1,7 @@
 -r requirements.txt
 
 black==22.6.0
-flake8==5.0.3
+flake8==5.0.4
 isort==5.10.1
 mypy==0.971
 pillow==9.2.0