language: node_js
node_js:
  - "4"
  - "6"
  - "7"
script: "npm run-script travis"

language: node_js
node_js:
  - "6"
  - "8"
  - "10"
script: "npm run-script travis"

Build with node.js 6, 8, 10, drop 4 and 7
Travis: Build with node.js 6, 8, 10, drop 4 and 7
