update sourcemap tests

test/sourcemaps/index.js

@@ -5,7 +5,7 @@ import { loadConfig, svelte } from "../helpers.js";
 import { SourceMapConsumer } from "source-map";
 import { getLocator } from "locate-character";
 
-describe("sourcemaps", () => {
+describe.only("sourcemaps", () => {
 	fs.readdirSync("test/sourcemaps/samples").forEach(dir => {
 		if (dir[0] === ".") return;
 

test/sourcemaps/samples/basic/input.svelte

@@ -1 +1,5 @@
+<script>
+	export let foo;
+</script>
+
 {foo.bar.baz}

test/sourcemaps/samples/binding/input.svelte

@@ -1 +1,5 @@
+<script>
+	export let foo;
+</script>
+
 <input bind:value={foo.bar.baz}>