Allow fields to be defined when Meta is passed in

graphene/relay/connection.py

@@ -86,25 +86,19 @@ class Connection(ObjectType):
 
         options["name"] = name
         _meta.node = node
-        _meta.fields = OrderedDict(
-            [
-                (
-                    "page_info",
-                    Field(
+        if not _meta.fileds:
+            _meta.fields = OrderedDict()
+        _meta.fields.update(
+            page_info=Field(
                 PageInfo,
                 name="pageInfo",
                 required=True,
                 description="Pagination data for this connection.",
             ),
-                ),
-                (
-                    "edges",
-                    Field(
+            edges=Field(
                 NonNull(List(edge)),
                 description="Contains the nodes in this connection.",
             ),
-                ),
-            ]
         )
         return super(Connection, cls).__init_subclass_with_meta__(
             _meta=_meta, **options