travis: fixes failure on six (#4415)

This commit is contained in:
Massimiliano Culpo 2017-06-01 14:42:33 +02:00 committed by GitHub
parent 61f640238b
commit 489dde1135

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@ -85,6 +85,7 @@ before_install:
# Install various dependencies
install:
- pip install --upgrade pip
- pip install --upgrade six
- pip install --upgrade setuptools
- pip install --upgrade codecov
- pip install --upgrade flake8