When to support variable name syntax highlighting in <script setup> please?

[microkof]

The version of vetur in my PC is 0.33.1. VS Code theme is Monokai.

Now vetur doesn't support syntax highlighting in <script setup>. For example:

[microkof]

And, since the variables is not needed to return, can you add a marker to the variable to indicate that it will be implicitly returned.

[yoyo930021]

Duplicate of #2296