language: node_js
node_js:
  - "8"
  - "6"
  - "4"
  - "0.12"
before_script:
  - npm install -g mocha
script: 
  - echo $TRAVIS_NODE_VERSION
  - if [[ $(echo "$TRAVIS_NODE_VERSION >= 6" | bc -l) ]]; then npm run test; fi
  - npm run e2e
after_success:
  - if [[ $(echo "$TRAVIS_NODE_VERSION >= 6" | bc -l) ]]; then npm run coveralls; fi