Move to Flutter 3.47, use the improvements that come with this (#64)

Reviewed-on: #64

lib/helpers/launch_helper.dart

@@ -2,10 +2,7 @@ import "package:flutter/services.dart";
 import "package:flutter_riverpod/flutter_riverpod.dart";
 import "package:url_launcher/url_launcher.dart" as ul;
 
-class LaunchHelper {
-  final Ref ref;
-  LaunchHelper(this.ref);
-
+class LaunchHelper(Ref ref) {
   Future<bool> launchUrl(Uri url, {bool useWebview = false}) async {
     try {
       return await ul.launchUrl(