How to use an installed public package in Dataform?

[tomlag]

I installed this package in dataform successfully
https://www.npmjs.com/package/libphonenumber-js

This is how it looks the package.json

{
  "name": "vx_operation",
  "dependencies": {
    "@dataform/core": "3.0.2",
    "libphonenumber-js":"1.11.7"
  }
}

This is how it looks the require statement. And I'm getting the error "Unexpected token 'export'"

Do you know what could be?

I searched the dataform documentation several times, including the googlecloudcommunity and youtube. I didn't find examples of installing external libraries. 

Thanks