Bump flake8 from 6.1.0 to 7.0.0

Bumps [flake8](https://github.com/pycqa/flake8) from 6.1.0 to 7.0.0.
- [Commits](PyCQA/flake8@6.1.0...7.0.0)

---
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

@@ -40,7 +40,7 @@ mypy = "^1.0.0"
 
 [tool.poetry.group.linting.dependencies]
 black = "^23.1"
-flake8 = "^6.0.0"
+flake8 = ">=6,<8"
 isort = "^5.7.0"
 slotscheck = "^0.17.0"