大幅変更＆環境バージョンアップ

lib/widgets/fake_search.dart

@@ -1,10 +1,10 @@
 import 'package:flutter/material.dart';
-import 'package:rogapp/pages/search/search_page.dart';
+import 'package:gifunavi/pages/search/search_page.dart';
 
 class FakeSearch extends StatelessWidget {
   const FakeSearch({
-    Key? key,
-  }) : super(key: key);
+    super.key,
+  });
 
   @override
   Widget build(BuildContext context) {