-r requirements.txt
flake8==3.7.7
pytest==4.4.1
pytest-cov==2.6.1
pytest-django==3.4.8

-r requirements.txt
flake8==3.7.7
pytest==4.4.1
pytest-cov==2.7.1
pytest-django==3.4.8

Update pytest-cov from 2.6.1 to 2.7.1
Update pytest-cov from 2.6.1 to 2.7.1