Roll Observatory packages and add a roll script

packages/quiver/test/time/all_tests.dart

Index: packages/quiver/test/time/all_tests.dart
diff --git a/quiver/lib/time.dart b/packages/quiver/test/time/all_tests.dart
similarity index 86%
rename from quiver/lib/time.dart
rename to packages/quiver/test/time/all_tests.dart
index e71b2d3aa7efa644af5b79b814bab0189980000f..7820d90dbc3ea51035c30a05971a6dd46636b03a 100644
--- a/quiver/lib/time.dart
+++ b/packages/quiver/test/time/all_tests.dart
@@ -12,7 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-library quiver.time;
+library quiver.time.all_tests;
 
-part 'src/time/clock.dart';
-part 'src/time/duration_unit_constants.dart';
+import 'clock_test.dart' as clock;
+
+main() {
+  clock.main();
+}