Bump pytest-cov from 2.12.0 to 2.12.1

Bumps [pytest-cov](https://github.com/pytest-dev/pytest-cov) from 2.12.0 to 2.12.1.
- [Release notes](https://github.com/pytest-dev/pytest-cov/releases)
- [Changelog](https://github.com/pytest-dev/pytest-cov/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest-cov@v2.12.0...v2.12.1)

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

Author: dependabot-preview[bot]

requirements.txt

@@ -2,7 +2,7 @@ isort==5.8.0
 black==21.5b2; implementation_name=="cpython"
 pytest==6.2.4
 pytest-asyncio==0.15.1
-pytest-cov==2.12.0
+pytest-cov==2.12.1
 docutils==0.17.1
 mypy==0.812; implementation_name=="cpython"
 flake8==3.9.2