Isomorphic NPM packaging

Because the javascript world is completely fucking insane, it has come to my attention that we aren't really shipping the best isomorphic packages for downstream users.

This guy seems to know what he is on about: https://nickb.dev/blog/recommendations-when-publishing-a-wasm-library/

His example lib is good here too: https://github.com/nickbabcock/highwayhasher