language: node_js
node_js:
  - "10"
  - "9"
  - "8"
  - "7"
  - "6"
  - "5"
  - "4"

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

Add Node.js 11 and 12 to the Travis CI rotation.
Add Node.js 11 and 12 to the Travis CI rotation.
