Create create-listener-collection package

[Andarist]

react-redux/src/utils/Subscription.js

Lines 8 to 10 in dde1a0a

	function createListenerCollection() {
	// the current/next pattern is copied from redux's createStore code.
	// TODO: refactor+expose that code to be reusable here?

Would you be interested in me working on this one? Would be cool to share this code between redux & react-redux. Also I could potentially reuse it in redux-saga as we have our own implementation of this copied & tweaked from redux.

[timdorr]

This code is going to be going away in 6.0: https://github.com/reduxjs/react-redux/pull/1000/files#diff-aef7770e642ef4054826f6c0aab908c8 (It's also gone in #995 too).

Feel free to crib it for your own usage, but it looks like we're not going to need it here much longer.