chore(deps): update dependency mypy to v0.991

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
mypy (source, changelog)	0.910 -> 0.991

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Release Notes

python/mypy

### [`v0.991`](https://togithub.com/python/mypy/compare/v0.990...v0.991) [Compare Source](https://togithub.com/python/mypy/compare/v0.990...v0.991) ### [`v0.990`](https://togithub.com/python/mypy/compare/v0.982...v0.990) [Compare Source](https://togithub.com/python/mypy/compare/v0.982...v0.990) ### [`v0.982`](https://togithub.com/python/mypy/compare/v0.981...v0.982) [Compare Source](https://togithub.com/python/mypy/compare/v0.981...v0.982) ### [`v0.981`](https://togithub.com/python/mypy/compare/v0.971...v0.981) [Compare Source](https://togithub.com/python/mypy/compare/v0.971...v0.981) ### [`v0.971`](https://togithub.com/python/mypy/compare/v0.961...v0.971) [Compare Source](https://togithub.com/python/mypy/compare/v0.961...v0.971) ### [`v0.961`](https://togithub.com/python/mypy/compare/v0.960...v0.961) [Compare Source](https://togithub.com/python/mypy/compare/v0.960...v0.961) ### [`v0.960`](https://togithub.com/python/mypy/compare/v0.950...v0.960) [Compare Source](https://togithub.com/python/mypy/compare/v0.950...v0.960) ### [`v0.950`](https://togithub.com/python/mypy/compare/v0.942...v0.950) [Compare Source](https://togithub.com/python/mypy/compare/v0.942...v0.950) ### [`v0.942`](https://togithub.com/python/mypy/compare/v0.941...v0.942) [Compare Source](https://togithub.com/python/mypy/compare/v0.941...v0.942) ### [`v0.941`](https://togithub.com/python/mypy/compare/v0.940...v0.941) [Compare Source](https://togithub.com/python/mypy/compare/v0.940...v0.941) ### [`v0.940`](https://togithub.com/python/mypy/compare/v0.931...v0.940) [Compare Source](https://togithub.com/python/mypy/compare/v0.931...v0.940) ### [`v0.931`](https://togithub.com/python/mypy/compare/v0.930...v0.931) [Compare Source](https://togithub.com/python/mypy/compare/v0.930...v0.931) ### [`v0.930`](https://togithub.com/python/mypy/compare/v0.921...v0.930) [Compare Source](https://togithub.com/python/mypy/compare/v0.921...v0.930) ### [`v0.921`](https://togithub.com/python/mypy/compare/v0.920...v0.921) [Compare Source](https://togithub.com/python/mypy/compare/v0.920...v0.921) ### [`v0.920`](https://togithub.com/python/mypy/compare/v0.910...v0.920) [Compare Source](https://togithub.com/python/mypy/compare/v0.910...v0.920)

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Configuration

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