language: node_js
node_js:
  - "4"
notifications:
  email:
    on_success: change
    on_failure: always

language: node_js
node_js:
  - "4"
  - "6"
notifications:
  email:
    on_success: change
    on_failure: always

Add node 6 to ci tests.
Add node 6 to ci tests.
