language: node_js
node_js:
  - "4"
  - "6"
  - "8"
  - "9"
script: "npm run-script travis"

language: node_js
node_js:
  - "6"
  - "8"
  - "9"
script: "npm run-script travis"

Drop node.js 4 support (semver-major)
Drop node.js 4 support (semver-major)
