`componentUpdated` function missing in LivePreview.vue

[o1y]

Bug description

Custom Live Preview inputs configured via config/statamic/live_preview.php don't work in V6.

How to reproduce

1. Configure a custom Live Preview input in config/statamic/live_preview.php
2. Register a Vue component that emits input events
3. Open Live Preview and select a value in the custom input
4. Observe the componentUpdated is not a function error in the console

Logs

TypeError: vn.componentUpdated is not a function
    onInput index-CijHn_rK.js:251
    callWithErrorHandling index-CijHn_rK.js:17
    callWithAsyncErrorHandling index-CijHn_rK.js:17
    emit index-CijHn_rK.js:18
    onSelected LivePreviewModePicker.vue:50
    callWithErrorHandling index-CijHn_rK.js:17
    callWithAsyncErrorHandling index-CijHn_rK.js:17
    emit index-CijHn_rK.js:18
    0 index-CijHn_rK.js:157

Environment

6.0.0

Installation

Fresh statamic/statamic site via CLI

Additional details

No response