feat:切换flutter版本

lib/common/services/database/entity/classify_entity.dart

@@ -14,28 +14,28 @@ class ClassifyEntity extends Equatable {
   int? id;
 
   /// 服务端唯一标识
-  String serviceUniqueCode;
+  final String serviceUniqueCode;
 
   /// 平台类型
-  SysType sysType;
+  final SysType sysType;
 
   /// 分类名
-  String name;
+  final String name;
 
   /// 用餐类型，早餐、中餐、晚餐
-  String categoryType;
+  final String categoryType;
 
   /// 排序 倒序排列
-  int sort;
+  final int sort;
 
   /// 创建时间
-  DateTime createTime;
+  final DateTime createTime;
 
   /// 同步时间
-  DateTime updateTime;
+  final DateTime updateTime;
 
   /// 是否删除
-  bool delFlag;
+  final bool delFlag;
 
   ClassifyEntity({
     this.id,