build: (deps): bump flutter_local_notifications from 19.5.0 to 20.0.0

Bumps [flutter_local_notifications](https://github.com/MaikuB/flutter_local_notifications) from 19.5.0 to 20.0.0.
- [Release notes](https://github.com/MaikuB/flutter_local_notifications/releases)
- [Commits](https://github.com/MaikuB/flutter_local_notifications/compare/flutter_local_notifications-v19.5.0...flutter_local_notifications-v20.0.0)

---
updated-dependencies:
- dependency-name: flutter_local_notifications
  dependency-version: 20.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

lib/utils/client_manager.dart

@@ -161,17 +161,17 @@ abstract class ClientManager {
     final flutterLocalNotificationsPlugin = FlutterLocalNotificationsPlugin();
 
     await flutterLocalNotificationsPlugin.initialize(
-      const InitializationSettings(
+      settings: const InitializationSettings(
         android: AndroidInitializationSettings('notifications_icon'),
         iOS: DarwinInitializationSettings(),
       ),
     );
 
-    flutterLocalNotificationsPlugin.show(
-      0,
-      title,
-      body,
-      const NotificationDetails(
+    await flutterLocalNotificationsPlugin.show(
+      id: 0,
+      title: title,
+      body: body,
+      notificationDetails: const NotificationDetails(
         android: AndroidNotificationDetails(
           'error_message',
           'Error Messages',