Roll Observatory packages and add a roll script

packages/quiver/test/all_tests.dart

Index: packages/quiver/test/all_tests.dart
diff --git a/packages/quiver/test/all_tests.dart b/packages/quiver/test/all_tests.dart
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+++ b/packages/quiver/test/all_tests.dart
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+// Copyright 2013 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+library quiver.all_tests;
+
+import 'async/all_tests.dart' as async;
+import 'cache/map_cache_test.dart' as cache;
+import 'check_test.dart' as check;
+import 'collection/all_tests.dart' as collection;
+import 'core/all_tests.dart' as core;
+import 'io_test.dart' as io;
+import 'iterables/all_tests.dart' as iterables;
+import 'mirrors_test.dart' as mirrors;
+import 'pattern/all_tests.dart' as pattern;
+import 'streams/all_tests.dart' as streams;
+import 'strings_test.dart' as strings;
+import 'testing/all_tests.dart' as testing;
+import 'time/all_tests.dart' as time;
+
+main() {
+  async.main();
+  cache.main();
+  check.main();
+  collection.main();
+  core.main();
+  io.main();
+  iterables.main();
+  mirrors.main();
+  pattern.main();
+  streams.main();
+  strings.main();
+  testing.main();
+  time.main();
+}