language: node_js
node_js:
  - '8'
  - '6'
addons:
  apt:
    sources:
      - ubuntu-toolchain-r-test
    packages:
      - libcairo2-dev
      - libjpeg8-dev
      - libpango1.0-dev
      - libgif-dev
      - g++-4.9
env:
  - CXX=g++-4.9
script: npm test
cache: yarn