-r common.txt
coveralls==1.5.1
mock==2.0.0
pytest==4.1.0
pytest-cov==2.6.1
tox==3.6.1

-r common.txt
coveralls==1.5.1
mock==2.0.0
pytest==4.1.0
pytest-cov==2.6.1
tox==3.7.0

Update tox from 3.6.1 to 3.7.0
Update tox from 3.6.1 to 3.7.0