Fixed a stray lint issue due to recent PR.

Author: diegotori

lib/src/center_seek_button.dart

@@ -2,15 +2,15 @@ import 'package:flutter/material.dart';
 
 class CenterSeekButton extends StatelessWidget {
   const CenterSeekButton({
-    Key? key,
+    super.key,
     required this.iconData,
     required this.backgroundColor,
     this.iconColor,
     required this.show,
     this.fadeDuration = const Duration(milliseconds: 300),
     this.iconSize = 26,
     this.onPressed,
-  }) : super(key: key);
+  });
 
   final IconData iconData;
   final Color backgroundColor;