Roll Observatory packages and add a roll script

packages/quiver/test/core/all_tests.dart

Index: packages/quiver/test/core/all_tests.dart
diff --git a/quiver/lib/cache.dart b/packages/quiver/test/core/all_tests.dart
similarity index 75%
copy from quiver/lib/cache.dart
copy to packages/quiver/test/core/all_tests.dart
index b962bcead54cc55a96ea931bd27450f592b0a4f1..7b0b6a824ddb8d56a9d60ba7775f602b9bb92304 100644
--- a/quiver/lib/cache.dart
+++ b/packages/quiver/test/core/all_tests.dart
@@ -12,12 +12,14 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-library quiver.cache;
+library quiver.core.all_tests;
 
-import 'dart:async';
-import 'dart:collection';
+import 'core_test.dart' as core;
+import 'hash_test.dart' as hash;
+import 'optional_test.dart' as optional;
 
-import 'package:quiver/collection.dart' show LruMap;
-
-part 'src/cache/cache.dart';
-part 'src/cache/map_cache.dart';
+main() {
+  core.main();
+  hash.main();
+  optional.main();
+}