language: node_js
node_js:
    - "node"
    - "7.7.1"
    - "6"
services: 
    - mongodb
cache:
  directories:
    - node_modules
language: node_js
node_js:
    - "node"
    - "6"
services: 
    - mongodb
cache:
  directories:
    - node_modules
Change Travis to test against latest Node and Node 6 only
Change Travis to test against latest Node and Node 6 only
