Bump setuptools from 59.6.0 to 60.0.3

Bumps [setuptools](https://github.com/pypa/setuptools) from 59.6.0 to 60.0.3.
- [Release notes](https://github.com/pypa/setuptools/releases)
- [Changelog](https://github.com/pypa/setuptools/blob/main/CHANGES.rst)
- [Commits](pypa/setuptools@v59.6.0...v60.0.3)

---
updated-dependencies:
- dependency-name: setuptools
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements/testing.txt

@@ -8,6 +8,6 @@ pylint==2.12.2
 pytest==6.2.5
 pytest-cov==3.0.0
 pytest-timeout==2.0.2
-setuptools==59.6.0
+setuptools==60.0.3
 tox==3.24.4
 twine==3.7.1