Update mypy requirement (#28)

Updates the requirements on [mypy](https://github.com/python/mypy) to permit the latest version.
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.0.0...v1.20.1)

---
updated-dependencies:
- dependency-name: mypy
  dependency-version: 1.20.1
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Nilvanis <62594212+nilvanis@users.noreply.github.com>

Author: dependabot[bot]

pyproject.toml

@@ -35,7 +35,7 @@ dev = [
     "pytest>=8.0",
     "pytest-cov>=7.1.0",
     "ruff>=0.8",
-    "mypy>=1.0",
+    "mypy>=1.20.1",
     "types-PyYAML>=6.0",
 ]