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

language: node_js
node_js:
  - "6"
  - "8"
  - "10"
  - "11"
script: "npm run-script travis"

Test with node.js 11 as well
Travis: Test with node.js 11 as well
