language: node_js
node_js:
  - '6.11.2'
after_success:
  - 'cat ./coverage/lcov.info | ./node_modules/.bin/coveralls'

language: node_js
node_js:
  - '6.11.2'
after_success:
  - 'cat ./coverage/lcov.info | ./node_modules/.bin/coveralls'
branches:
  only:
    - master

Configure para que Travis solo mire en Master
Configure para que Travis solo mire en Master