Auto deployment is working for NPM

https://travis-ci.org/feathericon/feathericon/jobs/438273327#L817

```shell
npm ERR! You must be logged in to publish packages. : feathericon
npm ERR! A complete log of this run can be found in:
npm ERR!     /home/travis/.npm/_logs/2018-10-07T14_11_43_329Z-debug.log
```

npm releasing
https://docs.travis-ci.com/user/deployment/npm/