language: node_js
node_js:
  - '6'
  - '8'
  - '9'
env:
  - CXX=g++-4.8
addons:
  apt:
    sources:
      - ubuntu-toolchain-r-test
    packages:
      - g++-4.8
before_install: 'sudo apt-get update && sudo apt-get install -y optipng pngcrush pngquant graphicsmagick libjpeg-turbo-progs inkscape libcairo2-dev libgif-dev libjpeg8-dev zlib-dev'
script: 'npm run-script travis'

language: node_js
node_js:
  - '6'
  - '8'
  - '10'
env:
  - CXX=g++-4.8
addons:
  apt:
    sources:
      - ubuntu-toolchain-r-test
    packages:
      - g++-4.8
before_install: 'sudo apt-get update && sudo apt-get install -y optipng pngcrush pngquant graphicsmagick libjpeg-turbo-progs inkscape libcairo2-dev libgif-dev libjpeg8-dev zlib-dev'
script: 'npm run-script travis'

Use node.js 10 instead of 9
Use node.js 10 instead of 9
