Bump flake8 from 4.0.1 to 6.0.0 (#25)

Bumps [flake8](https://github.com/pycqa/flake8) from 4.0.1 to 6.0.0.
- [Release notes](https://github.com/pycqa/flake8/releases)
- [Commits](PyCQA/flake8@4.0.1...6.0.0)

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

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

Author: dependabot[bot]

pyproject.toml

@@ -70,7 +70,7 @@ test = [
     "pytest-asyncio",
     "black==21.12b0",
     "isort==5.10.1",
-    "flake8==4.0.1",
+    "flake8==6.0.0",
     "django-stubs",
     "python-jose==3.3.0",
     "click==8.0.4"