Move to Flutter 3.47, use the improvements that come with this (#64)

Reviewed-on: #64

lib/models/requests/get_room_state.dart

@@ -1,15 +1,17 @@
 import "package:freezed_annotation/freezed_annotation.dart";
+
 part "get_room_state.freezed.dart";
 part "get_room_state.g.dart";
 
-@freezed
-abstract class GetRoomStateRequest with _$GetRoomStateRequest {
-  const factory GetRoomStateRequest({
-    required String roomId,
-    @Default(false) bool refetch,
-    @Default(false) bool fetchMembers,
-    @Default(false) bool includeMembers,
-  }) = _GetRoomStateRequest;
+@Freezed(toJson: false, fromJson: false)
+@JsonSerializable()
+class const GetRoomStateRequest({
+  required final String roomId,
+  final bool refetch = false,
+  final bool fetchMembers = false,
+  final bool includeMembers = false,
+}) with _$GetRoomStateRequest {
+  Map<String, Object?> toJson() => _$GetRoomStateRequestToJson(this);
 
   factory GetRoomStateRequest.fromJson(Map<String, Object?> json) =>
       _$GetRoomStateRequestFromJson(json);