Asynchronously using a synchronous disposable that returns a Promise

[rictic]

Describe the bug
A promise returned by a Symbol.dispose method should not be awaited by AsyncDisposableStack.prototype.use

To Reproduce
Steps to reproduce the behavior:

import { AsyncDisposableStack } from "https://deno.land/x/dispose/mod.ts";
{
  const stack = new AsyncDisposableStack();
  const neverResolves = Promise.withResolvers().promise;
  stack.use({[Symbol.dispose]() { return neverResolves }});
  await stack.disposeAsync();
  console.log('[1] does this line of code ever run?'); 
}

Expected behavior
The console log should run. When I tried this polyfill with Deno 2.2.1 the console log statement never ran.

Additional context

tc39/proposal-explicit-resource-management#256