Update pub to use new import syntax.

utils/tests/pub/version_test.dart

Index: utils/tests/pub/version_test.dart
diff --git a/utils/tests/pub/version_test.dart b/utils/tests/pub/version_test.dart
index 7b3b238b6fcba4bea25eb9b8c284929e04cb4462..e82766e519dc151298a0d429d13751eadee6bc83 100644
--- a/utils/tests/pub/version_test.dart
+++ b/utils/tests/pub/version_test.dart
@@ -2,11 +2,11 @@
 // 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.
 
-#library('version_test');
+library version_test;
 
-#import('../../../pkg/unittest/unittest.dart');
-#import('../../pub/utils.dart');
-#import('../../pub/version.dart');
+import '../../../pkg/unittest/unittest.dart';
+import '../../pub/utils.dart';
+import '../../pub/version.dart';
 
 main() {
   final v123 = new Version.parse('1.2.3');