fixed dart errors in notificationService

lib/notification/notificationService.dart

@@ -24,7 +24,7 @@ class NotificationService {
     );
 
     await flutterLocalNotificationsPlugin.initialize(
-      initializationSettings,
+      settings: initializationSettings
     );
   }
 
@@ -46,10 +46,10 @@ class NotificationService {
     );
 
     await flutterLocalNotificationsPlugin.show(
-      0,
+      id: 0,
-      title,
+      title: title,
-      body,
+      body: body,
-      platformChannelSpecifics,
+      notificationDetails: platformChannelSpecifics
     );
   }
 }