chore(deps): update mypy requirement from ==1.* to ==2.* (#448)

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...v2.0.0)

---
updated-dependencies:
- dependency-name: mypy
  dependency-version: 2.0.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Karthik Bekal Pattathana <133984042+karthikbekalp@users.noreply.github.com>

Author: dependabot[bot]

requirements-testing.txt

@@ -1,6 +1,6 @@
 black == 26.*
 coverage[toml] == 7.*
-mypy == 1.*
+mypy == 2.*
 pytest == 9.*
 pytest-cov == 7.*
 pytest-xdist == 3.*