Always upgrade setuptools and pip. pytest should always be up to date.

pl-kevinwurster · pl-kevinwurster · commit 6cfca4b06118 · 2017-12-05T15:17:36.000-05:00
diff --git a/.travis.yml b/.travis.yml
@@ -6,7 +6,7 @@ cache:
   directories:
     - $HOME/.cache/pip
 before_install:
-  - pip install --upgrade pytest
+  - pip install setuptools pip --upgrade
 install:
   - pip install -e .[dev]
 script:
