Bump travis node 4.x to 4.4.

Author: davidlehn

.travis.yml

@@ -2,7 +2,7 @@ language: node_js
 node_js:
   - "0.10"
   - "0.12"
-  - "4.2"
+  - "4.4"
   - "node"
 sudo: false
 # download test suite and run tests... submodule? meta testing project with