sudo: false
language: node_js
node_js:
  - '0.12'
  - '4'
  - '5'
cache:
  directories:
    - node_modules

sudo: false
language: node_js
node_js:
  - '0.12'
  - '4'
  - '5'
  - '6'
cache:
  directories:
    - node_modules

Test in Node.js 6 too.
Test in Node.js 6 too.