-r requirements.txt
flake8==3.7.5
pytest==4.2.0
pytest-cov==2.6.1
pytest-django==3.4.7

-r requirements.txt
flake8==3.7.7
pytest==4.2.0
pytest-cov==2.6.1
pytest-django==3.4.7

Update flake8 from 3.7.5 to 3.7.7
Update flake8 from 3.7.5 to 3.7.7