Deprecated Linting Settings

[purpleslurple]

Apparently flake8 has some soon to be deprecated settings: https://github.com/education/codespaces-teaching-template-py/blob/808d092756bda92db75fc42fe2411dcd6c3d578b/.devcontainer/devcontainer.json#L25

[alfredodeza]

Thanks for catching that @purpleslurple ! Can you help us out with a PR to make the fix?

[purpleslurple]

Sure @alfredodeza, I'll give it a go.