title: Vue 3 ::v-deep usage as a combinator has been deprecated. Use ::v-deep(<inner-selector>) instead
body: <p>I started getting the following warning in Vue 3 with the <code>::v-deep</code> usage.</p>
  <pre><code>::v-deep usage as a combinator has been deprecated. Use ::v-deep(&lt;inner-selector&gt;) instead
  </code></pre>
  <p>The CSS looks like as follows:</p>
  <pre><code>.parent ::v-deep .child {
     ...
  }
  </code></pre>
  <p>What's the correct way to use suggested option <code>::v-deep(&lt;inner-selector&gt;)</code>?</p>