Bump mypy from 1.0.1 to 1.2.0 in /requirements

Bumps [mypy](https://github.com/python/mypy) from 1.0.1 to 1.2.0.
- [Release notes](https://github.com/python/mypy/releases)
- [Commits](python/mypy@v1.0.1...v1.2.0)

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

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

requirements/requirements.dev.txt

@@ -3,7 +3,7 @@
 bandit==1.7.4
 black==23.1.0
 flake8==6.0.0
-mypy==1.0.1
+mypy==1.2.0
 pylint==2.17.0
 pytest-cov==4.0.0
 pytest-mock==3.10.0