Bump flake8 from 4.0.1 to 7.0.0

Bumps [flake8](https://github.com/pycqa/flake8) from 4.0.1 to 7.0.0.
- [Commits](PyCQA/flake8@4.0.1...7.0.0)

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

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

test-requirements.txt

@@ -7,6 +7,6 @@ requests_mock==1.8.0
 pytest-xvfb==2.0.0
 keyring==23.5.0
 mock==5.0.2
-flake8==4.0.1
+flake8==7.0.0
 PyQt5-stubs==5.14.2.2
 pytest-mypy==0.9.0