Run travis builds on more node versions

Joel Mukuthu · Joel Mukuthu · commit 64333a1a2afd · 2016-05-23T19:33:34.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,5 +1,9 @@
 language: node_js
 node_js:
   - '0.10'
+  - '0.12'
+  - '4'
+  - '5'
+  - '6'
 before_script:
   - 'npm install -g bower grunt-cli'
