Bump flake8 from 4.0.1 to 5.0.4

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] <[email protected]>

Author: dependabot[bot]

poetry.lock

@@ -37,7 +37,7 @@ Sphinx = "^4.3.2"
 sphinx-rtd-theme = "^1.0.0"
 pytest = "^7.1.1"
 pytest-cov = "^4.0.0"
-flake8 = "^4.0.1"
+flake8 = "^5.0.4"
 isort = "^5.10.1"
 black = "^22.3.0"
 sphinx-copybutton = "^0.5.0"