Consider publishing an NPM package

## Prerequisites:

> Is the functionality available in the GitHub UI? If so, please provide a link to information about the feature.

N/A, not related to the GitHup API.

## New Feature

I would like to see this published to [the public NPM registry](https://www.npmjs.com/) as a packaged probot module, similar to [@repository-settings/app](https://www.npmjs.com/package/@repository-settings/app).

### Reasoning
Within my organization, there are quick and easy processes for building and deploying Node.js apps using standard pipelines. Meanwhile, custom docker images and helm charts require significantly more overhead and approval.

I'm currently deploying an instance of [repository-settings](https://github.com/repository-settings/app) as a custom Node.js app, but I would like to migrate to using safe-settings instead. Currently, I would need to copy the repository to our internal Github Enterprise instance and maintain it manually, which is a poor security stance. If I could install it from NPM, I could keep it updated automatically.

### Contribution
I would gladly offer to contribute a PR myself but, unfortunately, this fundamentally requires a maintainer. Still, I will gladly provide whatever assistance I can.