Update dart2js deps to prevent crash on unsupported platform libraries.

test/kernel/regression/unsupported_platform_library.dart

Index: test/kernel/regression/unsupported_platform_library.dart
diff --git a/test/kernel/regression/deferred_lib.dart b/test/kernel/regression/unsupported_platform_library.dart
similarity index 85%
copy from test/kernel/regression/deferred_lib.dart
copy to test/kernel/regression/unsupported_platform_library.dart
index b4e6442acb004dce20232556b3b8f42e63cc78eb..ca1de9bd5f7a6c3bc1f8b53693122dbe8819d6e0 100644
--- a/test/kernel/regression/deferred_lib.dart
+++ b/test/kernel/regression/unsupported_platform_library.dart
@@ -2,6 +2,5 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE.md file.
 
-library deferred_lib;
-
-foo() => null;
+import 'dart:html';
+import 'dart:io';