Improve code snippet in README to support Unicode

README.md

@@ -108,7 +108,7 @@ Here is an example where the app sends a simple response, so there's no need for
 ```js
 // Reverse all messages the app can hear
 app.message(async ({ message, say }) => {
-  const reversedText = message.text.split('').reverse().join('');
+  const reversedText = [...message.text].reverse().join("");
   await say(reversedText);
 });
 ```