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.
- [Commits](PyCQA/flake8@4.0.1...5.0.4)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

poetry.lock

@@ -26,7 +26,7 @@ python-coveralls = "^2.9.3"
 
 [tool.poetry.group.dev.dependencies]
 pytest = "^7.2"
-flake8 = "^4.0.1"
+flake8 = ">=4.0.1,<6.0.0"
 black = ">=22.8,<24.0"
 pre-commit = "^2.20.0"