Add documentMeta parameter in RoutingClient createNew method (#119)

Author: dan12411

lib/src/client/routing_client.dart

@@ -47,13 +47,15 @@ class RoutingClient {
   /// - [one] - resource to-one relationships
   /// - [many] - resource to-many relationships
   /// - [meta] - resource meta data
+  /// - [documentMeta] - document meta
   /// - [headers] - any extra HTTP headers
   Future<ResourceCreated> createNew(
     String type, {
     Map<String, Object?> attributes = const {},
     Map<String, Identifier> one = const {},
     Map<String, Iterable<Identifier>> many = const {},
     Map<String, Object?> meta = const {},
+    Map<String, Object?> documentMeta = const {},
     Map<String, String> headers = const {},
   }) async {
     final response = await send(
@@ -64,7 +66,8 @@ class RoutingClient {
             ...one.map((key, value) => MapEntry(key, ToOne(value))),
             ...many.map((key, value) => MapEntry(key, ToMany(value))),
           })
-          ..meta.addAll(meta)))
+          ..meta.addAll(meta))
+          ..meta.addAll(documentMeta))
           ..headers.addAll(headers));
 
     return ResourceCreated(

test/unit/client/client_test.dart

@@ -256,6 +256,8 @@ void main() {
         'tags': [Identifier('tags', '1'), Identifier('tags', '2')]
       }, meta: {
         'answer': 42
+      }, documentMeta: {
+        'hello': 'world'
       }, headers: {
         'foo': 'bar'
       });
@@ -290,7 +292,8 @@ void main() {
             }
           },
           'meta': {'answer': 42}
-        }
+        },
+        'meta': {'hello': 'world'}
       });
     });
   });