language: node_js
node_js:
  - "6"
  - "7"
  - "8"

language: node_js
node_js:
  - "4"
  - "6"
  - "7"
  - "8"

Revert "Remove Node 4 from Travis"
Revert "Remove Node 4 from Travis"

This reverts commit 51d36a41211f33622bbadc70c91bfa8805c3f5a6.
