Updating travis-ci.org build config to use latest stable versions of nodejs 4.x & 5.x

Author: avoidwork

.travis.yml

@@ -1,7 +1,6 @@
 language: node_js
 node_js:
-  - "5.5"
-  - "5.0"
-  - "4.2"
+  - "5.11"
+  - "4.4"
   - "0.12"
   - "0.10"