Update editor.dart for compatibility with Flutter version 3.13.0

lib/src/widgets/editor.dart

@@ -42,6 +42,8 @@ abstract class EditorState extends State<RawEditor>
 
   String get pastePlainText;
 
+  bool get liveTextInputEnabled => false;
+
   /// Controls the floating cursor animation when it is released.
   /// The floating cursor is animated to merge with the regular cursor.
   AnimationController get floatingCursorResetController;