Bug: types and export map aren't quite right

[jasikpark]

• I'm submitting a ... [X] bug report [ ] feature request [ ] question about the decisions made in the repository [ ] question about how to use this project

• Summary

https://arethetypeswrong.github.io/?p=stylelint-cascade-layers%400.3.0 shows that there are some issues with the built output of this plugin

• Other information (e.g. detailed explanation, stacktraces, related issues, suggestions how to fix, links for us to have context, eg. StackOverflow, personal fork, etc.)

[mrtnvh]

Issue of the incorrect default export at the build tool: https://github.com/privatenumber/pkgroll/issues/51