[package_info] Ensure async works in the integration_test app.

Author: ditman

packages/package_info/example/test_driver/integration_test.dart

@@ -2,17 +2,15 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
-
 import 'package:flutter_driver/flutter_driver.dart';
 
 Future<void> main() async {
   final FlutterDriver driver = await FlutterDriver.connect();
-  final String data = await driver.requestData(
-    null,
-    timeout: const Duration(minutes: 1),
-  );
+  final String data =
+      await driver.requestData(null, timeout: const Duration(minutes: 1));
   await driver.close();
   final Map<String, dynamic> result = jsonDecode(data);
   exit(result['result'] == 'true' ? 0 : 1);