fix(react-exsample): fix postmessage processing in app

examples/react/src/App.tsx

@@ -1,27 +1,25 @@
 import { useState } from 'react';
-import { vscodeWebview } from '@tomjs/vscode-webview';
 import { VSCodeButton, VSCodeTextField } from '@vscode/webview-ui-toolkit/react';
 import { vscode } from './utils/vscode';
 
 import './App.css';
 
 function App() {
   function onPostMessage() {
-    vscodeWebview.postMessage('hello', 'Hey there partner! 🤠');
+    vscode.postMessage({
+      type: 'hello',
+      data: 'Hey there partner! 🤠' + message,
+    });
   }
 
-  vscodeWebview.on('hello', data => {
-    console.log('on message:', data);
-  });
-
   const [message, setMessage] = useState('');
   const [state, setState] = useState('');
 
   const onSetState = () => {
     vscode.setState(state);
   };
-  const onGetState = async () => {
-    setState((await vscode.getState()) as string);
+  const onGetState = () => {
+    setState(vscode.getState() as string);
   };
 
   return (