适配新版本api

lib/module/home/system_bean.dart

@@ -0,0 +1,23 @@
+
+import 'package:json_conversion_annotation/json_conversion_annotation.dart';
+
+@JsonConversion()
+class SystemBean {
+  String? version;
+
+  SystemBean({this.version});
+
+  SystemBean.fromJson(Map<String, dynamic> json) {
+    version = json['version'];
+  }
+
+  Map<String, dynamic> toJson() {
+    final Map<String, dynamic> data = new Map<String, dynamic>();
+    data['version'] = this.version;
+    return data;
+  }
+
+  static SystemBean jsonConversion(Map<String, dynamic> json) {
+    return SystemBean.fromJson(json);
+  }
+}