chore(deps): bump mypy from 1.19.1 to 1.20.0 in the dependencies group (#456)

Bumps the dependencies group with 1 update: [mypy](https://github.com/python/mypy).


Updates `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
  dependency-group: dependencies
...

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

Author: dependabot[bot]

pyproject.toml

@@ -13,7 +13,7 @@ dependencies = [
 dev = [
     "black==26.3.1",
     "flake8==7.3.0",
-    "mypy==1.19.1",
+    "mypy==1.20.0",
     "mypy-extensions==1.1.0",
     "pylint==4.0.5",
     "pytest==9.0.2",