Bump pytest-cov from 3.0.0 to 6.0.0

Bumps [pytest-cov](https://github.com/pytest-dev/pytest-cov) from 3.0.0 to 6.0.0.
- [Changelog](https://github.com/pytest-dev/pytest-cov/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest-cov@v3.0.0...v6.0.0)

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

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

Author: dependabot[bot]

requirements/ci.txt

@@ -2,6 +2,6 @@
 cryptography==36.0.1; platform_machine!="i686" # no 32-bit wheels; no python 3.9 wheels yet
 pytest==7.2.2
 pytest-aiohttp==0.3.0
-pytest-cov==3.0.0
+pytest-cov==6.0.0
 trustme==0.9.0; platform_machine!="i686"    # no 32-bit wheels
 twine==4.0.2