Bump mypy from 0.971 to 1.7.0

Bumps [mypy](https://github.com/python/mypy) from 0.971 to 1.7.0.
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v0.971...v1.7.0)

---
updated-dependencies:
- dependency-name: mypy
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

tests/requirements.txt

@@ -6,7 +6,7 @@ coverage-pyver-pragma>=0.2.1
 domdf-python-tools[testing]>=2.0.1
 importlib-metadata>=3.6.0
 iniconfig!=1.1.0,>=1.0.1
-mypy==0.971; platform_python_implementation == "CPython"
+mypy==1.7.0; platform_python_implementation == "CPython"
 psutil>=5.9.6; platform_python_implementation == "PyPy" and platform_system != "Windows"
 psutil>=5.9.6; platform_python_implementation != "PyPy" and platform_system == "Windows"
 psutil>=5.9.6; platform_python_implementation != "PyPy" and platform_system != "Windows"