language: node_js
node_js:
  - "node"
  - "7"
  - "6"
cache:
  directories:
    - node_modules
after_success: npm run coverage

language: node_js
node_js:
  - "node"
  - "7"
  - "6"
cache:
  directories:
    - $HOME/.npm
    - node_modules
after_success: npm run coverage

Add Travis CI cache setting.
Add Travis CI cache setting.
