Linked templates does not return errors

I just realized that linked template are not triggering errors with the plugin ! Am I right  or did I miss something in my configuration ? Those linked template should also return accessibility errors.

In my case this kind of configuration does not return any error :(

```
// Vue file
<script>....</script>
<template src="./template.html" >

// template.html file
<span>👩</span>
```