language: node_js
node_js:
  - "4"
  - "6"
script: "npm run-script travis"
after_success: "<coverage/lcov.info ./node_modules/coveralls/bin/coveralls.js"

language: node_js
node_js:
  - "8"
  - "9"
script: "npm run-script travis"
after_success: "<coverage/lcov.info ./node_modules/coveralls/bin/coveralls.js"

Test with node 8 and 9
Travis: Test with node 8 and 9
