Strict pyright

[ewjoachim]

Make pyright check strict

Successful PR Checklist:

• [ ] Tests
  • [x] (not applicable?)
• [ ] Documentation
  • [x] (not applicable?)

PR label(s):

• [ ] https://github.com/ewjoachim/poetry-to-pre-commit/labels/breaking
• [ ] https://github.com/ewjoachim/poetry-to-pre-commit/labels/feature
• [ ] https://github.com/ewjoachim/poetry-to-pre-commit/labels/bugfix
• [x] https://github.com/ewjoachim/poetry-to-pre-commit/labels/miscellaneous
• [ ] https://github.com/ewjoachim/poetry-to-pre-commit/labels/dependencies
• [ ] https://github.com/ewjoachim/poetry-to-pre-commit/labels/documentation

[ewjoachim]

Superseeded by #17