fix analysis

packages/stream_chat/analysis_options.yaml

@@ -44,7 +44,6 @@ linter:
     - avoid_private_typedef_functions
     - avoid_redundant_argument_values
     - avoid_return_types_on_setters
-    - avoid_returning_null
     - avoid_returning_null_for_void
     - avoid_shadowing_type_parameters
     - avoid_single_cascade_in_expression_statements

packages/stream_chat/lib/src/api/channel.dart

@@ -1209,6 +1209,7 @@ class ChannelClientState {
   ChannelClientState(
     this._channel,
     ChannelState channelState,
+    // ignore: unnecessary_parenthesis
   ) : _debouncedUpdatePersistenceChannelState = ((ChannelState state) {
           _channel?._client?.chatPersistenceClient?.updateChannelState(state);
         }).debounced(const Duration(seconds: 1)) {