env:
  - CXX=g++-4.8
language: node_js
node_js:
  - "4"
addons:
  apt:
    sources:
    - ubuntu-toolchain-r-test
    packages:
    - g++-4.8

env:
  - CXX=g++-4.8
language: node_js
node_js:
  - "4"
  - "5"
addons:
  apt:
    sources:
    - ubuntu-toolchain-r-test
    packages:
    - g++-4.8

Test on Node.js 5 as well
Test on Node.js 5 as well
