Type of bind:this on svg elements is `HTMLElement`

[sorig]

Describe the bug
Creating a this binding on svg elements is not correctly typed.

To Reproduce

1. Create a fresh typescript template project.

2. Replace the content of App.svelte with:

<script lang="ts">
	let group : SVGElement;
</script>

<main>
	<svg>
		<g bind:this={group}></g>
	</svg>
</main>

3. Run npm run validate. The following error is returned.

./svelte-typescript-app/src/App.svelte:7:17
Error: Argument of type 'SVGElement' is not assignable to parameter of type 'HTMLElement'.
  Type 'SVGElement' is missing the following properties from type 'HTMLElement': accessKey, accessKeyLabel, autocapitalize, dir, and 16 more. (ts)

Expected behavior
group should be of type SVGElement

System (please complete the following information):

• OS: macOS
• IDE: VSCode
• Plugin/Package: "Svelte for VSCode", svelte-check