Update .travis.yml (#464)

Mariatta · willingc · commit 4db833f1b508 · 2019-02-12T20:53:38.000-05:00
diff --git a/.travis.yml b/.travis.yml
@@ -2,7 +2,7 @@ language: python
 python: 3.6
 cache: pip
 
-install: python3 -m pip install -r requirements.txt
+install: python3 -m pip install -U pip -r requirements.txt
 
 jobs:
   include:
