sudo: false
language: node_js
node_js:
  - iojs
  - "0.12"

sudo: false
language: node_js
node_js:
  - iojs
  - "0.12"
  - "4"

Add Node.js 4.0 stable to Travis config
Add Node.js 4.0 stable to Travis config

NodeJS v4 was just released [NodeJS v4 announcement](https://nodejs.org/en/blog/release/v4.0.0/). This updates the CI build script to accommodate the release.