language: node_js
node_js:
  - "7.10.0"
install: "npm install"
script: "npm run-script test-cover"

language: node_js
node_js:
  - "8.5.0"
install: "npm install"
script: "npm run-script test-cover"

Upgrade node version to 8.5
Upgrade node version to 8.5