add test

test/runtime/samples/binding-this-store/_config.js

@@ -0,0 +1,4 @@
+export default {
+	skip_if_ssr: true,
+	html: `<div>object</div>`
+};

test/runtime/samples/binding-this-store/main.svelte

@@ -0,0 +1,6 @@
+<script>
+	import { writable } from 'svelte/store';
+	const foo = writable();
+</script>
+
+<div bind:this={$foo}>{typeof $foo}</div>