misc updates

CONTRIBUTING.md

@@ -25,7 +25,7 @@ it should raise analysis issues as you edit; alternatively validate from the
 Terminal:
 
 ```
-dartanalyzer lib test
+dart analyze
 ```
 
 All analysis warnings and errors must be fixed; hints should be considered.
@@ -33,8 +33,7 @@ All analysis warnings and errors must be fixed; hints should be considered.
 ## Running tests
 
 ```
-pub get
-pub run test
+dart test
 ```
 
 gRPC-web tests require [`envoy`](

lib/grpc.dart

@@ -13,8 +13,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// ignore: dangling_library_doc_comments
-/// Status detail types and error codes
+/// Status detail types and error codes.
+library;
+
 export 'package:grpc/src/generated/google/rpc/error_details.pb.dart';
 
 export 'src/auth/auth.dart' show BaseAuthenticator;