Update pubspecs and dependencies to get pkgbuild tests working.

pkg/third_party/angular_tests/vm_test.dart

-/// auto-generated by update_angular.sh
-
-// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
-// 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 angular_vm_tests;
-
-import 'package:unittest/compact_vm_config.dart';
-import 'package:unittest/unittest.dart';
-import '../../../third_party/pkg/angular/test/tools/html_extractor_spec.dart' as test_0;
-import '../../../third_party/pkg/angular/test/tools/selector_spec.dart' as test_1;
-import '../../../third_party/pkg/angular/test/tools/source_metadata_extractor_spec.dart' as test_2;
-
-main() {
-  useCompactVMConfiguration();
-
-  group('tools/html_extractor', () {
-    test_0.main();
-  });
-
-  group('tools/selector', () {
-    test_1.main();
-  });
-
-  group('tools/source_metadata_extractor', () {
-    test_2.main();
-  });
-}