Published package.json has workspace declared

When working on my project, I'm getting warnings from yarn about private packages and workspaces. I've tracked it down to this package and was wondering if you could release an update where that the deployed package.json file doesn't list `workspaces`? You can find out more about it [here](https://github.com/yarnpkg/yarn/issues/8580) on yarn's issues.

```cmd
$> warning Workspaces can only be enabled in private projects.
```

The issue names no source file or test. Start by inspecting the package publishing configuration and the generated package.json, then reproduce the Yarn warning if possible. Done means a published package.json no longer declares workspaces while the package remains publishable.

Written by the indexing model from the issue text.