language: node_js
node_js:
  - "8"
  - "6"
  - "5"
  - "4"
install:
  - npm install

language: node_js
node_js:
  - "12"
  - "11"
  - "10"
  - "9"
  - "8"
  - "7"
  - "6"
  - "5"
  - "4"
install:
  - npm install

Test on some more recent Node.JS versions
Test on some more recent Node.JS versions