Promise is not polyfilled for IE

[birdofpreyru]

This code crashes in IE due to Promise being not defined.

react-global-state/src/index.js

Lines 1 to 9 in 0bf59ee

	/* TODO: This is a temporary polyfill for `Promise.allSettled(..)` method,
	* which is supported natively by NodeJS >= v12.9.0. As earlier NodeJS version
	* are still in a wide use, this polyfill is added here, and it is to be dropped
	* some time later. */
	if (!Promise.allSettled) {
	Promise.allSettled = (promises) => Promise.all(
	promises.map((p) => (p instanceof Promise ? p.finally(() => null) : p)),
	);
	}