-r requirements.txt
coverage==4.5.2
coveralls==1.6.0
flake8==3.7.5
mock==2.0.0
pytest==4.2.1
pytest-cov==2.6.1

-r requirements.txt
coverage==4.5.2
coveralls==1.6.0
flake8==3.7.6
mock==2.0.0
pytest==4.2.1
pytest-cov==2.6.1

Update flake8 from 3.7.5 to 3.7.6
Update flake8 from 3.7.5 to 3.7.6