fix lint

example/lib/home.dart

@@ -10,10 +10,10 @@ import 'package:rxdart_ext/rxdart_ext.dart';
 const listKey = 'com.hoc.list';
 
 class MyHomePage extends StatefulWidget {
-  const MyHomePage({Key? key}) : super(key: key);
+  const MyHomePage({super.key});
 
   @override
-  _MyHomePageState createState() => _MyHomePageState();
+  State<MyHomePage> createState() => _MyHomePageState();
 }
 
 class _MyHomePageState extends State<MyHomePage> {

example/lib/main.dart

@@ -22,7 +22,7 @@ void main() {
 }
 
 class MyApp extends StatelessWidget {
-  const MyApp({Key? key}) : super(key: key);
+  const MyApp({super.key});
 
   @override
   Widget build(BuildContext context) {

example/pubspec.lock

@@ -42,7 +42,7 @@ packages:
     source: hosted
     version: "1.1.1"
   collection:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: collection
       sha256: ee67cb0715911d28db6bf4af1026078bd6f0128b07a5f66fb2ed94ec6783c09a

example/pubspec.yaml

@@ -15,7 +15,7 @@ dependencies:
   rxdart_ext: ^0.3.0
   rx_shared_preferences:
   shared_preferences: ^2.3.0
-
+  collection: ^1.17.0
 dependency_overrides:
   rx_shared_preferences:
     path: ../