-r requirements.txt
attrs==19.3.0
pytest==5.4.2
pytest-cov==2.8.1
mock==2.0.0
flake8==3.8.2
pyflakes==2.2.0

-r requirements.txt
attrs==19.3.0
pytest==5.4.2
pytest-cov==2.9.0
mock==2.0.0
flake8==3.8.2
pyflakes==2.2.0

Bump pytest-cov from 2.8.1 to 2.9.0
Bump pytest-cov from 2.8.1 to 2.9.0

Bumps [pytest-cov](https://github.com/pytest-dev/pytest-cov) from 2.8.1 to 2.9.0.
- [Release notes](https://github.com/pytest-dev/pytest-cov/releases)
- [Changelog](https://github.com/pytest-dev/pytest-cov/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest-cov/compare/v2.8.1...v2.9.0)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>