updated project style guidelines

lib/api/webuntis/queries/getHolidays/getHolidays.dart

@@ -8,7 +8,7 @@ class GetHolidays extends WebuntisApi {
 
   @override
   Future<GetHolidaysResponse> run() async {
-    String rawAnswer = await query(this);
+    var rawAnswer = await query(this);
     return finalize(GetHolidaysResponse.fromJson(jsonDecode(rawAnswer)));
   }
 
@@ -17,12 +17,12 @@ class GetHolidays extends WebuntisApi {
     time = DateTime(time.year, time.month, time.day, 0, 0, 0, 0, 0);
 
     for (var element in holidaysResponse.result) {
-      DateTime start = DateTime.parse(element.startDate.toString());
-      DateTime end = DateTime.parse(element.endDate.toString());
+      var start = DateTime.parse(element.startDate.toString());
+      var end = DateTime.parse(element.endDate.toString());
 
       if(!start.isAfter(time) && !end.isBefore(time)) return element;
     }
     return null;
   }
 
-}
+}

lib/api/webuntis/queries/getHolidays/getHolidaysCache.dart

@@ -10,12 +10,8 @@ class GetHolidaysCache extends RequestCache<GetHolidaysResponse> {
   }
 
   @override
-  Future<GetHolidaysResponse> onLoad() {
-    return GetHolidays().run();
-  }
+  Future<GetHolidaysResponse> onLoad() => GetHolidays().run();
 
   @override
-  GetHolidaysResponse onLocalData(String json) {
-    return GetHolidaysResponse.fromJson(jsonDecode(json));
-  }
-}
+  GetHolidaysResponse onLocalData(String json) => GetHolidaysResponse.fromJson(jsonDecode(json));
+}

lib/api/webuntis/queries/getHolidays/getHolidaysResponse.dart

@@ -26,4 +26,4 @@ class GetHolidaysResponseObject {
 
   factory GetHolidaysResponseObject.fromJson(Map<String, dynamic> json) => _$GetHolidaysResponseObjectFromJson(json);
   Map<String, dynamic> toJson() => _$GetHolidaysResponseObjectToJson(this);
-}
+}