Bug fix - 200 - enable seek gesture in paused mode (#272)

Author: himanshuGandhiSimform

lib/src/controllers/player_controller.dart

@@ -263,10 +263,9 @@ class PlayerController extends ChangeNotifier {
   /// Minimum Android [O] is required to use this function
   /// otherwise nothing happens.
   Future<void> seekTo(int progress) async {
-    if (progress < 0) return;
-    if (_playerState == PlayerState.playing) {
-      await AudioWaveformsInterface.instance.seekTo(playerKey, progress);
-    }
+    if (progress < 0 || _playerState.isStopped) return;
+
+    await AudioWaveformsInterface.instance.seekTo(playerKey, progress);
   }
 
   /// Release any resources taken by this controller. Disposing this