feat(travis): Update node to v6 in travis

kunalkapadia · kunalkapadia · commit 9f279af43360 · 2016-06-03T19:38:40.000+05:30
kunalkapadia#10
diff --git a/.travis.yml b/.travis.yml
@@ -1,7 +1,7 @@
 language: node_js
 node_js:
   - "4.4"
-  - "5.11"
+  - "6.2"
 services:
   - mongodb
 cache:
