chore(deps): Update mypy requirement from ~=1.6 to ~=1.7 (#53)

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@v1.6.0...v1.7.0)

---
updated-dependencies:
- dependency-name: mypy
  dependency-type: direct:production
...

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

requirements-testing.txt

@@ -4,7 +4,7 @@ pytest ~= 7.4
 pytest-cov ~= 4.1
 pytest-xdist ~= 3.5
 twine ~= 4.0
-mypy ~= 1.6
+mypy ~= 1.7
 black ~= 23.12
 ruff ~= 0.1.8
 moto[s3,sts] ~= 4.2