use node 4 for now

dfreedm · dfreedm · commit eff142429ece · 2015-12-15T17:04:18.000-08:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,6 +1,6 @@
 language: node_js
 sudo: false
-node_js: stable
+node_js: 4
 addons:
   firefox: latest
   apt:
