Bump mypy from 0.812 to 0.910 in /ngraph/python

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:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

ngraph/python/requirements_test.txt

@@ -3,7 +3,7 @@ flake8-bugbear==21.4.3
 flake8-comprehensions==3.3.0
 flake8-docstrings==1.6.0
 flake8-quotes==3.2.0
-mypy==0.812
+mypy==0.910
 onnx==1.8.1
 pydocstyle==5.1.1
 pytest-xdist==2.2.1