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

Reviewed-on: #64

lib/models/paginate.dart

@@ -1,16 +1,18 @@
 import "package:fast_immutable_collections/fast_immutable_collections.dart";
 import "package:freezed_annotation/freezed_annotation.dart";
 import "package:nexus/models/event.dart";
+
 part "paginate.freezed.dart";
 part "paginate.g.dart";
 
-@freezed
-abstract class Paginate with _$Paginate {
-  const factory Paginate({
-    required IList<Event> events,
-    required IList<Event> relatedEvents,
-    required bool hasMore,
-  }) = _Paginate;
+@Freezed(toJson: false, fromJson: false)
+@JsonSerializable()
+class const Paginate({
+  required final IList<Event> events,
+  required final IList<Event> relatedEvents,
+  required final bool hasMore,
+}) with _$Paginate {
+  Map<String, Object?> toJson() => _$PaginateToJson(this);
 
   factory Paginate.fromJson(Map<String, Object?> json) =>
       _$PaginateFromJson(json);