-r requirements.txt
coveralls==3.0.1
pytest==6.2.1
pytest-cov==2.11.1
flake8==3.8.4

-r requirements.txt
coveralls==3.0.1
pytest==6.2.1
pytest-cov==2.11.1
flake8==3.9.1

Update flake8 from 3.8.4 to 3.9.1
Update flake8 from 3.8.4 to 3.9.1