Frontend URL not getting set in serverless service info

[permalink](https://github.com/rogersgt/serverless-frontend-plugin/blob/e8f200bf0eb97348d690f3df728df0e7c5b9626c/index.js#L180)
```JavaScript
    this.serverless.addServiceOutputSection('frontend url', frontendUrlsArray);
```

The line above does not appear to be working as expected. It should display this item after `serverless deploy ` or `serverless info`.