rand dart fix

deprecated/easy_web_view/example/lib/examples/basic.dart

@@ -2,7 +2,7 @@ import 'package:easy_web_view/easy_web_view.dart';
 import 'package:flutter/material.dart';
 
 class BasicExample extends StatefulWidget {
-  const BasicExample({Key? key}) : super(key: key);
+  const BasicExample({super.key});
 
   @override
   _BasicExampleState createState() => _BasicExampleState();

deprecated/easy_web_view/example/lib/examples/html_to_pdf.dart

@@ -10,7 +10,7 @@ import 'package:async/async.dart';
 import 'package:flutter/services.dart';
 
 class HtmlToPdfTest extends StatefulWidget {
-  const HtmlToPdfTest({Key? key}) : super(key: key);
+  const HtmlToPdfTest({super.key});
 
   @override
   State<HtmlToPdfTest> createState() => _HtmlToPdfTestState();

deprecated/easy_web_view/example/lib/main.dart

@@ -6,7 +6,7 @@ import 'examples/html_to_pdf.dart';
 void main() => runApp(const MyApp());
 
 class MyApp extends StatefulWidget {
-  const MyApp({Key? key}) : super(key: key);
+  const MyApp({super.key});
 
   @override
   State<MyApp> createState() => _MyAppState();