Bump pytest-cov from 5.0.0 to 6.0.0

Bumps [pytest-cov](https://github.com/pytest-dev/pytest-cov) from 5.0.0 to 6.0.0.
- [Changelog](https://github.com/pytest-dev/pytest-cov/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest-cov@v5.0.0...v6.0.0)

---
updated-dependencies:
- dependency-name: pytest-cov
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

setup.py

@@ -17,7 +17,7 @@
     packages=find_packages(),
     include_package_data=True,
     install_requires=requirements,
-    extras_require={"test": ["coverage==7.6.4", "pytest==8.3.3", "pytest-cov==5.0.0", "tox==4.23.2"]},
+    extras_require={"test": ["coverage==7.6.4", "pytest==8.3.3", "pytest-cov==6.0.0", "tox==4.23.2"]},
     entry_points="""
         [console_scripts]
         xml-validate=validator.__main__:cli