-r base.txt

pytest==3.2.2
pytest-travis-fold==1.2.0
pytest-cov==2.5.1
future==0.16.0
six==1.10.0

-r base.txt

pytest==3.2.2
pytest-travis-fold==1.2.0
pytest-cov==2.5.1
future==0.16.0
six==1.11.0

Update six from 1.10.0 to 1.11.0
Update six from 1.10.0 to 1.11.0