[flutter] Revert change to native bindings, so we stay compatible with old Dart versions.

spine-flutter/lib/spine_flutter_bindings_generated.dart

@@ -9979,87 +9979,87 @@ class SpineFlutterBindings {
           .asFunction<void Function(spine_texture_region, int)>();
 }
 
-final class spine_skeleton_wrapper extends ffi.Opaque {}
+class spine_skeleton_wrapper extends ffi.Opaque {}
 
-final class spine_skeleton_data_wrapper extends ffi.Opaque {}
+class spine_skeleton_data_wrapper extends ffi.Opaque {}
 
-final class spine_bone_wrapper extends ffi.Opaque {}
+class spine_bone_wrapper extends ffi.Opaque {}
 
-final class spine_bone_data_wrapper extends ffi.Opaque {}
+class spine_bone_data_wrapper extends ffi.Opaque {}
 
-final class spine_slot_wrapper extends ffi.Opaque {}
+class spine_slot_wrapper extends ffi.Opaque {}
 
-final class spine_slot_data_wrapper extends ffi.Opaque {}
+class spine_slot_data_wrapper extends ffi.Opaque {}
 
-final class spine_skin_wrapper extends ffi.Opaque {}
+class spine_skin_wrapper extends ffi.Opaque {}
 
-final class spine_attachment_wrapper extends ffi.Opaque {}
+class spine_attachment_wrapper extends ffi.Opaque {}
 
-final class spine_region_attachment_wrapper extends ffi.Opaque {}
+class spine_region_attachment_wrapper extends ffi.Opaque {}
 
-final class spine_vertex_attachment_wrapper extends ffi.Opaque {}
+class spine_vertex_attachment_wrapper extends ffi.Opaque {}
 
-final class spine_mesh_attachment_wrapper extends ffi.Opaque {}
+class spine_mesh_attachment_wrapper extends ffi.Opaque {}
 
-final class spine_clipping_attachment_wrapper extends ffi.Opaque {}
+class spine_clipping_attachment_wrapper extends ffi.Opaque {}
 
-final class spine_bounding_box_attachment_wrapper extends ffi.Opaque {}
+class spine_bounding_box_attachment_wrapper extends ffi.Opaque {}
 
-final class spine_path_attachment_wrapper extends ffi.Opaque {}
+class spine_path_attachment_wrapper extends ffi.Opaque {}
 
-final class spine_point_attachment_wrapper extends ffi.Opaque {}
+class spine_point_attachment_wrapper extends ffi.Opaque {}
 
-final class spine_texture_region_wrapper extends ffi.Opaque {}
+class spine_texture_region_wrapper extends ffi.Opaque {}
 
-final class spine_sequence_wrapper extends ffi.Opaque {}
+class spine_sequence_wrapper extends ffi.Opaque {}
 
-final class spine_constraint_wrapper extends ffi.Opaque {}
+class spine_constraint_wrapper extends ffi.Opaque {}
 
-final class spine_constraint_data_wrapper extends ffi.Opaque {}
+class spine_constraint_data_wrapper extends ffi.Opaque {}
 
-final class spine_ik_constraint_wrapper extends ffi.Opaque {}
+class spine_ik_constraint_wrapper extends ffi.Opaque {}
 
-final class spine_ik_constraint_data_wrapper extends ffi.Opaque {}
+class spine_ik_constraint_data_wrapper extends ffi.Opaque {}
 
-final class spine_transform_constraint_wrapper extends ffi.Opaque {}
+class spine_transform_constraint_wrapper extends ffi.Opaque {}
 
-final class spine_transform_constraint_data_wrapper extends ffi.Opaque {}
+class spine_transform_constraint_data_wrapper extends ffi.Opaque {}
 
-final class spine_path_constraint_wrapper extends ffi.Opaque {}
+class spine_path_constraint_wrapper extends ffi.Opaque {}
 
-final class spine_path_constraint_data_wrapper extends ffi.Opaque {}
+class spine_path_constraint_data_wrapper extends ffi.Opaque {}
 
-final class spine_animation_state_wrapper extends ffi.Opaque {}
+class spine_animation_state_wrapper extends ffi.Opaque {}
 
-final class spine_animation_state_data_wrapper extends ffi.Opaque {}
+class spine_animation_state_data_wrapper extends ffi.Opaque {}
 
-final class spine_animation_state_events_wrapper extends ffi.Opaque {}
+class spine_animation_state_events_wrapper extends ffi.Opaque {}
 
-final class spine_event_wrapper extends ffi.Opaque {}
+class spine_event_wrapper extends ffi.Opaque {}
 
-final class spine_event_data_wrapper extends ffi.Opaque {}
+class spine_event_data_wrapper extends ffi.Opaque {}
 
-final class spine_track_entry_wrapper extends ffi.Opaque {}
+class spine_track_entry_wrapper extends ffi.Opaque {}
 
-final class spine_animation_wrapper extends ffi.Opaque {}
+class spine_animation_wrapper extends ffi.Opaque {}
 
-final class spine_atlas_wrapper extends ffi.Opaque {}
+class spine_atlas_wrapper extends ffi.Opaque {}
 
-final class spine_skeleton_data_result_wrapper extends ffi.Opaque {}
+class spine_skeleton_data_result_wrapper extends ffi.Opaque {}
 
-final class spine_render_command_wrapper extends ffi.Opaque {}
+class spine_render_command_wrapper extends ffi.Opaque {}
 
-final class spine_bounds_wrapper extends ffi.Opaque {}
+class spine_bounds_wrapper extends ffi.Opaque {}
 
-final class spine_color_wrapper extends ffi.Opaque {}
+class spine_color_wrapper extends ffi.Opaque {}
 
-final class spine_vector_wrapper extends ffi.Opaque {}
+class spine_vector_wrapper extends ffi.Opaque {}
 
-final class spine_skeleton_drawable_wrapper extends ffi.Opaque {}
+class spine_skeleton_drawable_wrapper extends ffi.Opaque {}
 
-final class spine_skin_entry_wrapper extends ffi.Opaque {}
+class spine_skin_entry_wrapper extends ffi.Opaque {}
 
-final class spine_skin_entries_wrapper extends ffi.Opaque {}
+class spine_skin_entries_wrapper extends ffi.Opaque {}
 
 abstract class spine_blend_mode {
   static const int SPINE_BLEND_MODE_NORMAL = 0;