Roll Observatory packages and add a roll script

packages/quiver/test/async/all_tests.dart

Index: packages/quiver/test/async/all_tests.dart
diff --git a/quiver/lib/core.dart b/packages/quiver/test/async/all_tests.dart
similarity index 53%
rename from quiver/lib/core.dart
rename to packages/quiver/test/async/all_tests.dart
index 8239f2d17150e1969c02549514254c581f2c917b..f615ff69eb7f26f5b09ecd54fdde4934c45541b6 100644
--- a/quiver/lib/core.dart
+++ b/packages/quiver/test/async/all_tests.dart
@@ -12,24 +12,22 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-/**
- * Simple code with broad use cases.
- */
-library quiver.core;
+library quiver.async.all_tests;
 
-part 'src/core/hash.dart';
-part 'src/core/optional.dart';
+import 'countdown_timer_test.dart' as countdown_timer;
+import 'create_timer_test.dart' as create_timer;
+import 'future_group_test.dart' as future_group;
+import 'future_stream_test.dart' as future_stream;
+import 'iteration_test.dart' as iteration;
+import 'metronome_test.dart' as metronome;
+import 'stream_router_test.dart' as stream_router;
 
-/**
- * Returns the first non-null argument. If all arguments are null, throws
- * an [ArgumentError].
- *
- * Note: if [o1] is an [Optional], this can be accomplished with `o1.or(o2)`.
- */
-firstNonNull(o1, o2, [o3, o4]) {
-  if (o1 != null) return o1;
-  if (o2 != null) return o2;
-  if (o3 != null) return o3;
-  if (o4 != null) return o4;
-  throw new ArgumentError('All arguments were null');
+main() {
+  countdown_timer.main();
+  create_timer.main();
+  future_group.main();
+  future_stream.main();
+  metronome.main();
+  iteration.main();
+  stream_router.main();
 }