-r base.txt
flake8==3.5.0
pre-commit==1.8.2
tox==2.9.1
django-debug-panel==0.8.3
django-debug-toolbar==1.9.1
sphinx-autobuild
django-rest-swagger==2.1.2

-r base.txt
flake8==3.5.0
pre-commit==1.8.2
tox==3.0.0
django-debug-panel==0.8.3
django-debug-toolbar==1.9.1
sphinx-autobuild
django-rest-swagger==2.1.2

Update tox from 2.9.1 to 3.0.0
Update tox from 2.9.1 to 3.0.0