language: node_js
matrix:
  include:
    - os: linux
      node_js: stable
    - os: linux
      node_js: 10
    - os: linux
      node_js: 8
    - os: linux
      node_js: 6
    - os: linux
      node_js: 4
    - os: windows
      node_js: latest
    - os: windows
      node_js: 10
    - os: windows
      node_js: 8
    - os: windows
      node_js: 6
    - os: windows
      node_js: 4

script:
  - npm test
  - 'if [ $TRAVIS_NODE_VERSION = stable ]; then npm run lint; fi'