os:
  - linux
  - osx

language: node_js
node_js:
  - '12'
  - '11'
  - '10'

cache:
  directories:
    - node_modules

script:
  - echo $TRAVIS_OS_NAME
  - node --version
  - npm --version
  - echo "Testing started ..."
  - npm test

notifications:
  email:
    on_success: change
    on_failure: change