adding yarn cache

weaverryan · weaverryan · commit 51e7c859fbd2 · 2017-06-11T09:03:40.000-04:00
diff --git a/.travis.yml b/.travis.yml
@@ -2,6 +2,7 @@ sudo: false
 language: node_js
 
 cache:
+  yarn: true
   directories:
     - $HOME/.npm
 
