Bump flake8 from 5.0.4 to 6.0.0

Bumps [flake8](https://github.com/pycqa/flake8) from 5.0.4 to 6.0.0.
- [Release notes](https://github.com/pycqa/flake8/releases)
- [Commits](PyCQA/flake8@5.0.4...6.0.0)

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

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

Author: dependabot[bot]

poetry.lock

@@ -20,7 +20,7 @@ codespell = "2.2.4"
 coverage = "7.2.2"
 pytest = "7.2.2"
 pytest-mock = "3.10.0"
-flake8 = "5.0.4"
+flake8 = "6.0.0"
 pep8-naming = "0.13.3"
 
 [tool.poetry.group.external]