build(deps-dev): bump mypy from 0.812 to 0.910

Bumps [mypy](https://github.com/python/mypy) from 0.812 to 0.910.
- [Release notes](https://github.com/python/mypy/releases)
- [Commits](python/mypy@v0.812...v0.910)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements-dev.txt

@@ -1,6 +1,6 @@
 coverage == 5.5
 freezegun == 1.1.0
-mypy == 0.812
+mypy == 0.910
 pylint == 2.8.2
 pytest == 6.2.4
 pytest-asyncio == 0.15.1