language: node_js
node_js:
    - "6"

after_success: npm run coveralls

language: node_js
node_js:
    - "4"
    - "6"

after_success: npm run coveralls

Revert "try skipping node 4"
Revert "try skipping node 4"

This reverts commit 58d232ed3d8714376bf1c93c75d08a56fc6bd217.
