Bug: Support ESM for the use-sync-external-store shim

[s-cork]

React version:
use-sync-external-store 1.0.0, 1.1.0

Steps To Reproduce

1. open up chrome dev tools

>>> var x = await import("https://cdn.skypack.dev/use-sync-external-store")
>>> x.useSyncExternalStore
undefined

Link to code example:
See above code snippet
I was trying to hack around with valtio
and if I do

import valtio from "https://cdn.skypack.dev/valtio@1.6.0";

or in the console

>>> var v = await import("https://cdn.skypack.dev/valtio@1.6.0")
Uncaught SyntaxError: The requested module '/-/use-sync-external-store@v1.0.0-ZzO0qn27iKOvDc2m57IV/dist=es2019,mode=imports/unoptimized/shim/index.js' does not provide an export named 'useSyncExternalStore' 

The current behavior

the use-sync-external-store shim does not support esm

The expected behavior

please support esm

additional context

the bug was reported at valtio

pmndrs/valtio#452
An attempt was made to workaround the issue at their end
But the import
>>> var v = await import("https://cdn.skypack.dev/valtio@1.6.1")
Still fails on the use-sync-external-store shim.

[brophdawg11]

Related - would it also be possible to provide a UMD build as well? We're looking to use this in the new version of react-router but having some trouble bundling our own UMD module without ESM or UMD support.

[github-actions]

This issue has been automatically marked as stale. If this issue is still affecting you, please leave any comment (for example, "bump"), and we'll keep it open. We are sorry that we haven't been able to prioritize it yet. If you have any new additional information, please include it with your comment!

[1EDExg0ffyXfTEqdIUAYNZGnCeajIxMWd2vaQeP]

It has a PR, please merge

[HansBrende]

It has in fact TWO PRs: #26230 and #25231

[github-actions]

This issue has been automatically marked as stale. If this issue is still affecting you, please leave any comment (for example, "bump"), and we'll keep it open. We are sorry that we haven't been able to prioritize it yet. If you have any new additional information, please include it with your comment!

[igorkamyshev]

Please stop closing issues with no real resolution.