dependencies:
  pre:
    # Test Node.js versions 4, 5, and 6 using 3x parallelism
    - case $CIRCLE_NODE_INDEX in 0) NODE_VERSION=4 ;; 1) NODE_VERSION=5 ;; 2) NODE_VERSION=6 ;; esac; nvm install $NODE_VERSION && nvm alias default $NODE_VERSION
  override:
    - npm prune && npm install

test:
  override:
    - npm test