Consider: Browser build (or adding "browser" field to package.json)

Currently, for Web-based projects using the Electrum library, some modules have to be resolved as externals to allow Electrum-Cash to run.

In Webpack, this may look as follows:

	resolve:
	{
		fallback:
		{
			events: 'events',
			net: false,
			tls: false,
		}
	},

We may want to consider either adding the following to browser key to package.json or - alternatively - provider a specific browser build:

browser: {
  net: false,
  tls: false,
  // NOTE: There may be others necessary.
}

... to ease integrating Electrum Cash into web-based projects.