Release WASM to npm

[gadomski]

I'm assuming we'll want to publish this under @develpomentseed in NPM, and I know nothing about NPM publishing so I'll need to figure that out. Docs: https://rustwasm.github.io/docs/wasm-pack/tutorials/npm-browser-packages/packaging-and-publishing.html

[kylebarron]

wasm-pack publish just delegates to npm publish; you can use either once you've built the distribution.

[gadomski]

Blocking this on #66