update: bump mypy from 1.8 to 1.9.0 (#14)

Bumps [mypy](https://github.com/python/mypy) from 1.8 to 1.9.0.
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.8.0...1.9.0)

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

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

pyproject.toml

@@ -25,7 +25,7 @@ dynamic = ["version"]
 [project.optional-dependencies]
 test = [
     "ruff>=0.2.0",
-    "mypy==1.8",
+    "mypy==1.9.0",
     "pre-commit==3.7.0",
     "pytest-cov==4.0.0",
     "pytest-mock<3.14.1",