[StreamChatPersistence] Fix connectionEventEntity, MessageDao

Signed-off-by: Sahil Kumar <[email protected]>

packages/stream_chat_persistence/lib/src/entity/connection_events.dart

@@ -1,10 +1,11 @@
 import 'package:moor/moor.dart';
+import 'package:stream_chat_persistence/src/converter/map_converter.dart';
 
 @DataClassName('ConnectionEventEntity')
 class ConnectionEvents extends Table {
   IntColumn get id => integer()();
 
-  TextColumn get ownUserId => text().nullable()();
+  TextColumn get ownUser => text().nullable().map(MapConverter<Object>())();
 
   IntColumn get totalUnreadCount => integer().nullable()();