language: node_js
node_js:
    - "0.10"
    - "0.12"
    - "4"
    - "5"
    - "6"
    - "7"

language: node_js
node_js:
    - "4"
    - "5"
    - "6"
    - "7"

Drop support for Node.js < v4
Breaking: Drop support for Node.js < v4
