v13 breaks `ember-cli-styles`

It [registers](https://github.com/webark/ember-cli-styles/blob/main/packages/namespace/addon/utils/register-style-factories.js#L3) `style:` things and then one can [look them up](https://github.com/webark/ember-cli-styles/blob/main/packages/namespace/addon/helpers/style-namespace.js#L10). This breaks when using `ember-resolver` v13. That is, doing `style-namespace "foo-bar"` returns a different thing than the one expected.

I can create a reproduction repo if that's going to help with debugging the issue.

cc @ef4