Add support for ESM "module" entrypoint

[FredKSchott]

This lets tools like pika.dev detect that your package is written as an ES Module and not Common.js. See https://github.com/rollup/rollup/wiki/pkg.module for more info

[aomarks]

Hi @FredKSchott! LGTM, thanks for the PR!

[aomarks]

Actually a question. It looks like rollup-plugin-node-resolve already falls back to main if module isn't found. Since we never intend to distribute a non-modules version, isn't this kind of fallback good enough? Does pika require the module field as its signal that a package should be indexed?

[justinfagnani]

Also, what about "type": "module". Would that suffice?

[abraham]

A module entry is needed for unpkg. https://unpkg.com/@material/mwc-fab@0.7.0?module

[dfreedm]

LGTM2

[FredKSchott]

👋 hey y’all! Great to see so many familiar faces. @kenchris tagged me in here from twitter.

I’d have to find it, but the official Node guidance is to not publish anything with “type”:”module” yet until it’s officially out from behind the flag. But their main concern is node breakage, so 🤷‍♂️.

[e111077]

approval train 🚂