Bump mypy from 0.942 to 0.950 (#647)

Bumps [mypy](https://github.com/python/mypy) from 0.942 to 0.950.
- [Release notes](https://github.com/python/mypy/releases)
- [Commits](https://github.com/python/mypy/compare/v0.942...v0.950)

---
updated-dependencies:
- dependency-name: mypy
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

pyproject.toml

@@ -94,7 +94,7 @@ flake8-functions = "^0.0.7"
 flake8-expression-complexity = "^0.0.11"
 
 # types
-mypy = "^0.942"
+mypy = "^0.950"
 types-ujson = "^4.2.0"
 types-PyMySQL = "^1.0.19"
 types-ipaddress = "^1.0.1"