title: In vue3+typescript devtools property does not working
body: <p>In Vue3+typescript,
  Property &quot;devtools&quot; does not existed on type &quot;AppConfig&quot;</p>
  <p><a href="https://i.stack.imgur.com/HLtqt.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/HLtqt.png" alt="Type of AppConfig" /></a></p>
  <p>But, <a href="https://v3.vuejs.org/api/application-config.html#devtools" rel="nofollow noreferrer">APIDoc</a> was guide to this.</p>
  <pre><code>app.config.devtools = true;
  </code></pre>
  <p>What should I do? T_T</p>