language: node_js
node_js:
  - 'iojs'
before_script:
  - export DISPLAY=:99.0; sh -e /etc/init.d/xvfb start

language: node_js
node_js:
  - 'iojs'
  - '4'
before_script:
  - export DISPLAY=:99.0; sh -e /etc/init.d/xvfb start

Add Node.js v4 stable to Travis config
Add Node.js v4 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. Note: It should be "4", not "4.0" since Node will surely get a lot of minor updates before it goes LTS and this repo should test on the latest of them.