Roll Observatory packages and add a roll script

packages/quiver/test/testing/all_tests.dart

Index: packages/quiver/test/testing/all_tests.dart
diff --git a/quiver/lib/testing/equality.dart b/packages/quiver/test/testing/all_tests.dart
similarity index 74%
rename from quiver/lib/testing/equality.dart
rename to packages/quiver/test/testing/all_tests.dart
index 32e4f709c874f5f84f8da62f59aa5a0e854cbb03..c695f46affd9bf5cc5c44a30d03c8731fbd41036 100644
--- a/quiver/lib/testing/equality.dart
+++ b/packages/quiver/test/testing/all_tests.dart
@@ -12,12 +12,12 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-/**
- * Utilities for testing the equality of Dart object
- */
-library quiver.testing.equality;
+library quiver.testing.all_tests;
 
-import 'package:matcher/matcher.dart';
-import 'package:quiver/iterables.dart';
+import 'async/all_tests.dart' as async;
+import 'equality/all_tests.dart' as equality;
 
-part 'src/equality/equality.dart';
+main() {
+  async.main();
+  equality.main();
+}