Fixes https://github.com/vector-im/element-web/issues/14947
Much like element-web's Jitsi wrapper build steps, this downloads the emoji JSON at build time to ensure it gets reasonably updated. In the future, the spec might want to consider publishing a dedicated i18n package on npm for this, however this is fine for now. We download rather than copy/paste to ensure we always have an updated copy.
We'll let babel decide where best to put the sourcemaps. We previously needed inline sourcemaps for browserify to work, though `babelify` takes care of this now that we use `src/` (without sourcemaps in `lib/` being inline, the transform wouldn't work).
Typescript sourcemaps have also been enabled as a mental reminder that they will be exported. Babel is the only thing that uses the tsconfig for generation right now, and it appears to ignore the sourcemaps field.
For https://github.com/vector-im/riot-web/issues/8880
Features:
* Export modern JS
* Export typings
* Export source maps that actually mean something
* No longer supporting minified builds
This is a step towards being a boring SDK and not anticipating an install location.
This commit requires a major version bump of the SDK.
Travis Ralston