https://docs.npmjs.com/files/package.json#repository

* Added /build/three.es2015.js target for jsnext:main

* Generated "three.es2015.js" using `npm run build`

* Renamed "three.es2015.js" to "three.jsnext.js"

* Renamed "three.jsnext.js" to "three.next.js"

* Fixed path to the es bundle

* ES Module bundle is now /build/three.modules.js

* Add rollup-watch to dev dependencies

* Remove chokidar-cli from devDependencies

- fixes #9598

* add build closure to make use off the closure compiler.

* add Closure compiler again

* convert to ES modules

* rebuild

* move shaders back into glsl files

* reinstate polyfills

* build.js ux improvements

- script can be run from any directory, uses script dir to determine
  relative paths to other needed files
- by default, determine minified file name from `output` file name (e.g.
  three.js -> three.min.js). minified file name can be explicitly set
  directly via a new option `minifiedoutput`
- if `minify` is true, still build un-minified file
- ensure sourcemap url refers to actual minified file name, (before,
  three.min.js was hard-coded)

* updating npm scripts with new build script usage

* add auto-builder.

* do an initial build when watching.

* add include directory in build-watch.

* incorporate zz85's suggestions.

Covers construction, cloning, json import/export. Use lodash from npm.