Types: `key` shouldn't undefined for `link` entries

[manniL]

Reproduction code:

<script setup lang="ts">
useHead({
  link: [{ rel: 'icon', key: 'favicon', href: 'SOME_STRING' }],
});
</script>
<template>
  <div>
    <h1>Hi</h1>
  </div>
</template>

Expected: key should be fine as string or ref/computed/... returning one

Actual:

[harlan-zw]

Thanks for the issue. This was legacy logic around key handling, for some reason links were excluded and I wasn't prepared to break anything to allow them.

This is fixed in v1, I'll leave this open until it's officially released

[harlan-zw]

v1 looking good, going to close this off