language: node_js
node_js:
  - "6"
  - "7"
  - "8"
script: "npm run-script travis"

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

Drop node.js 7, add 10
Travis: Drop node.js 7, add 10
