updated project style guidelines

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

@@ -15,7 +15,5 @@ class UpdateCustomTimetableEvent extends MhslApi<void> {
   void assemble(String raw) {}
 
   @override
-  Future<Response>? request(Uri uri) {
-    return http.patch(uri, body: jsonEncode(params.toJson()));
-  }
-}
+  Future<Response>? request(Uri uri) => http.patch(uri, body: jsonEncode(params.toJson()));
+}

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

@@ -14,4 +14,4 @@ class UpdateCustomTimetableEventParams {
 
   factory UpdateCustomTimetableEventParams.fromJson(Map<String, dynamic> json) => _$UpdateCustomTimetableEventParamsFromJson(json);
   Map<String, dynamic> toJson() => _$UpdateCustomTimetableEventParamsToJson(this);
-}
+}