Is "sideEffects": false, necessary in the package.json of v3.0.0

[mavon80]

With d726b58 you added "sideEffects": false, to the package.json

I use modern-normalize in my Storybook, just as documented in your readme as an import on top of the page, just like this:
import 'modern-normalize/modern-normalize.css'
But with this new config, tree shaking kicks it out again when i not set the import explicitly to a variable an use it, so i need to add a workaround in my code to really import it.

Not sure if i do something wrong but I don't get the new configuration.

[mavon80]

Thank you for the quick fix. :)