Bump mypy from 1.19.1 to 1.20.0 (#240)

Bumps [mypy](https://github.com/python/mypy) from 1.19.1 to 1.20.0.
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.19.1...v1.20.0)

---
updated-dependencies:
- dependency-name: mypy
  dependency-version: 1.20.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements-test.txt

@@ -1,6 +1,6 @@
 black==26.3.1
 flake8==7.3.0
-mypy==1.19.1
+mypy==1.20.0
 pylint==4.0.5
 pytest-asyncio==1.3.0
 pytest==9.0.2