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

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

Add Node 11 to the Travis CI test rotation.
Add Node 11 to the Travis CI test rotation.

https://nodejs.org/en/blog/release/v11.0.0/
