language: node_js
before_install:
  - npm install -g npm@3
node_js:
  - "4.1"
  - "4.0"
  - "0.12"

language: node_js
before_install:
  - npm install -g npm@3.7.1
node_js:
  - "4.1"
  - "4.0"
  - "0.12"

Use specific version of npm
Use specific version of npm