Bump mypy from 1.19.1 to 1.20.0

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

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

Author: dependabot[bot]

pyproject.toml

@@ -73,7 +73,7 @@ lint = [
   "black==26.3.1",
   "flake8==7.3.0",
   "isort==8.0.1",
-  "mypy==1.19.1",
+  "mypy==1.20.0",
   "pylint-per-file-ignores==3.2.0",
   "pylint==4.0.5",
 ]