Fix svelte 4 warning for ARIA role

[Isaac-alencar]

#1627

If as is neither 'a' nor 'button', it spreads the { role, tabindex } object.
if role is 'button', it won't be included as an attribute on the element, ensuring that the correct role is applied based on the element type specified by the as variable.

[reinink]

Hey! Thanks for this contribution, but I just tested this, and I'm still getting an ARIA warning:

vite v4.5.2 building SSR bundle for production...
transforming (27) ../../packages/svelte/src/index.js8:17:43 AM [vite-plugin-svelte] /Users/jonathanreinink/Sites/inertiajs-inertia/packages/svelte/src/Link.svelte:27:0 A11y: <svelte:element> with click, dblclick, mousedown, mousemove, mouseout, mouseover, mouseup handlers must have an ARIA role

What am I missing? 🤔

[reinink]

Think I'm going to just add a svelte-ignore for now to solve this, as I'm nervous about adding a role or tabIndex. I'm pretty sure this is a false positive, as @jessarcher suggested in #1635. Thanks either way for this contribution!! 🤙

[Isaac-alencar]

Think I'm going to just add a svelte-ignore for now to solve this, as I'm nervous about adding a role or tabIndex. I'm pretty sure this is a false positive, as @jessarcher suggested in #1635. Thanks either way for this contribution!! 🤙

sounds good to me! thank you for the support on this one!