use node 5 on CI

yyx990803 · yyx990803 · commit ba82b76cd5ba · 2016-03-09T01:36:27.000-05:00
diff --git a/circle.yml b/circle.yml
@@ -1,6 +1,6 @@
 machine:
   node:
-    version: 4
+    version: 5
 
 general:
   branches:
