Bump pytest-cov from 2.12.1 to 5.0.0

Bumps [pytest-cov](https://github.com/pytest-dev/pytest-cov) from 2.12.1 to 5.0.0.
- [Changelog](https://github.com/pytest-dev/pytest-cov/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest-cov@v2.12.1...v5.0.0)

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

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

requirements-dev.txt

@@ -3,7 +3,7 @@ requests>=2.19.1,<3.0.0
 aiohttp[speedups]>=3.7.4.post0,<4.0.0
 pytest==6.2.5
 pytest-html==3.1.1
-pytest-cov==2.12.1
+pytest-cov==5.0.0
 pytest-json-report==1.4.0
 pytest-aiohttp==0.3.0
 pytest-custom_exit_code==0.3.0