sudo: required
dist: trusty
language: node_js
node_js:
  - "4"
  - "5"
  - "6"
  - "7"
script:
  - yarn run test
  - yarn run lint
services:
  - redis

sudo: required
dist: trusty
language: node_js
node_js:
  - "6"
  - "7"
  - "8"
  - "9"
script:
  - yarn run test
  - yarn run lint
services:
  - redis

Drop node 4, 5 and add 8, 9
Drop node 4, 5 and add 8, 9
