Update mypy to 0.630

[pyup-bot]

This PR updates mypy from 0.620 to 0.630.

The bot wasn't able to find a changelog for this release. Got an idea?

Links

• PyPI: https://pypi.org/project/mypy
• Homepage: http://www.mypy-lang.org/

[coveralls]

Pull Request Test Coverage Report for Build 622

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 88.618%

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Totals
Change from base Build 547:	0.0%
Covered Lines:	2367
Relevant Lines:	2671

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 622

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 88.618%

---

Totals
Change from base Build 547:	0.0%
Covered Lines:	2367
Relevant Lines:	2671

---

💛 - Coveralls

[pyup-bot]

Closing this in favor of #98