react version update

example/src/App.test.tsx

@@ -1,9 +1,9 @@
 import React from "react";
-import ReactDOM from "react-dom";
+import { createRoot } from "react-dom/client";
 import App from "./App";
 
 it("renders without crashing", () => {
   const div = document.createElement("div");
-  ReactDOM.render(<App />, div);
-  ReactDOM.unmountComponentAtNode(div);
+  const root = createRoot(div);
+  root.render(<App />);
 });