stages:
  - publish

publish_to_npm:
  stage: publish
  tags: [build]
  script: 
    # see https://remysharp.com/2015/10/26/using-travis-with-private-npm-deps
    - echo "//registry.npmjs.org/:_authToken=\${NPM_TOKEN}" > .npmrc
    - npm publish
  only:
    - /^v.*$/