add destructuring-between-exports test against regression (#3628)

test/runtime/samples/destructuring-between-exports/_config.js

@@ -0,0 +1,8 @@
+export default {
+	props: {
+		foo: { bar: 42 }
+	},
+	html: `
+		<h1>42</h2>
+	`
+};

test/runtime/samples/destructuring-between-exports/main.svelte

@@ -0,0 +1,7 @@
+<script>
+	export let foo;
+	const { bar } = foo;
+	export let baz;
+</script>
+
+<h1>{bar}</h1>