use modern React.act

Author: eps1lon

src/pure.js

@@ -1,6 +1,6 @@
 import * as React from 'react'
 import ReactDOM from 'react-dom'
-import {act as domAct} from 'react-dom/test-utils'
+import * as DeprecatedReactTestUtils from 'react-dom/test-utils'
 import * as ReactDOMClient from 'react-dom/client'
 import {
   getQueriesForElement,
@@ -323,25 +323,20 @@ async function renderHook(renderCallback, options = {}) {
   return {result, rerender, unmount}
 }
 
-function compatAct(scope) {
-  // scope passed to domAct needs to be `async` until React.act treats every scope as async.
+const reactAct =
+  typeof React.act === 'function' ? React.act : DeprecatedReactTestUtils.act
+
+function act(scope) {
+  // scope passed to reactAct needs to be `async` until React.act treats every scope as async.
   // We already enforce `await act()` (regardless of scope) to flush microtasks
   // inside the act scope.
-  return domAct(async () => {
+  return reactAct(async () => {
     return scope()
   })
 }
 
 // just re-export everything from dom-testing-library
 export * from '@testing-library/dom'
-export {
-  render,
-  renderHook,
-  cleanup,
-  compatAct as act,
-  fireEvent,
-  getConfig,
-  configure,
-}
+export {render, renderHook, cleanup, act, fireEvent, getConfig, configure}
 
 /* eslint func-name-matching:0 */