Bump mypy from 1.15.0 to 1.19.0

Bumps [mypy](https://github.com/python/mypy) from 1.15.0 to 1.19.0.
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.15.0...v1.19.0)

---
updated-dependencies:
- dependency-name: mypy
  dependency-version: 1.19.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements-tests.txt

@@ -1,7 +1,7 @@
 anyio[trio] >= 3.2.1
 autoflake
 httpx
-mypy == 1.15.0
+mypy == 1.19.0
 pytest >= 7.1.3,< 9.0.0
 pytest-asyncio
 pytest-cov >= 2.12.0,< 7.0.0