Use yarn and node 7 in travis

alexfmpe · alexfmpe · commit 0863ea53e003 · 2017-07-02T01:43:18.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,7 +1,5 @@
-language: node_js
-node_js:
-  - "node"
-install: 
-  - npm install
-script:
-  - npm run build-prod
+language : node_js
+node_js  : 7
+cache    : yarn
+install  : yarn
+script   : npm run build-prod
