Update mypy requirement from >=1.0.0 to >=2.1.0 (#15)

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...v2.1.0)

---
updated-dependencies:
- dependency-name: mypy
  dependency-version: 2.1.0
  dependency-type: direct:development
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Didi Hoffmann <39629+ribalba@users.noreply.github.com>

Author: dependabot[bot]

requirements-dev.txt

@@ -9,7 +9,7 @@ pytest-asyncio>=1.4.0
 pylint>=2.15.0
 
 # Type checking
-mypy>=1.0.0
+mypy>=2.1.0
 types-PyYAML>=6.0.12.20260518
 
 # Code formatting