language: node_js
install:
  - npm install koa
  - npm install
node_js:
  - "4"
  - "5"

language: node_js
install:
  - npm install koa
  - npm install
node_js:
  - "4"
  - "6"
  - "8"

Test on node 6 and 8
Test on node 6 and 8
