Add pip cache

orf · web-flow · commit cda362e74666 · 2017-04-11T16:57:43.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -2,6 +2,7 @@ python: '3.5'
 
 language: python
 
+cache: pip
 sudo: false
 
 env:
