Allow to fill "success" slot

[kaisermann]

Maybe it'd be interesting to allow to customize the success slot instead of just rendering the dynamic component

<Loadable {loader} bind:component>
	<div slot="success">
		<svelte:component this={component} customProps={props}/>
	</div>
</Loadable>

[EmilTholin]

That would be cool. Just make sure not to run into this annoying behavior.

[kaisermann]

I think svelte handles this case (at least the basic one) for us because component start as null and will not be instantiated (I could be wrong though...) 🤔