zustand/shallow and zustand/middleware are not transpiled to cjs

[timkindberg]

I'm getting errors because zustand/middleware.js and zustand/shallow.js have non-supported syntax in them.

There is a .cjs.js file for each but then I have to import from 'zustand/middleware.cjs' which feels a bit weird, but it's a successful workaround.

It seems with additional non-main entries like these, they do not have the convenience of specifying main and module in the package.json like the main entry has. So the safest bet would probably be to have their .js file be the lowest common demoninator, commonjs.

I'm not sure these two entries need to be exported as anything but commonjs.

[drcmda]

that makes sense, i'll reconfigure rollup

[with-heart]

Can confirm that the rollup changes for this were completed in #65 and build outputs work as expected

[JeremyRH]

Great! Thank you for the feedback.