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

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

Drop node 4 support, remove 9 and add 10 and latest (semver-major)
Travis: Drop node 4 support, remove 9 and add 10 and latest (semver-major)
