Added api for custom timetable events

lib/api/mhsl/customTimetableEvent/update/updateCustomTimetableEventParams.dart

@@ -0,0 +1,17 @@
+
+import 'package:json_annotation/json_annotation.dart';
+
+import '../customTimetableEvent.dart';
+
+part 'updateCustomTimetableEventParams.g.dart';
+
+@JsonSerializable(explicitToJson: true)
+class UpdateCustomTimetableEventParams {
+  String id;
+  CustomTimetableEvent event;
+
+  UpdateCustomTimetableEventParams(this.id, this.event);
+
+  factory UpdateCustomTimetableEventParams.fromJson(Map<String, dynamic> json) => _$UpdateCustomTimetableEventParamsFromJson(json);
+  Map<String, dynamic> toJson() => _$UpdateCustomTimetableEventParamsToJson(this);
+}