fix bug in anima clear

addons/anima/core/anima_node.gd

@@ -37,7 +37,7 @@ func _exit_tree():
 	clear()
 
 	for child in get_children():
-		child.free()
+		child.queue_free()
 
 func _ready():
 	if not _anima_tween.is_connected("animation_completed",Callable(self,"_on_all_tween_completed")):
@@ -793,3 +793,5 @@ func _play_backwards(time: float) -> void:
 
 func debug():
 	print(get_animation_data())
+
+	return self

addons/anima/core/declaration/anima_declaration_node.gd

@@ -243,6 +243,12 @@ func clear():
 	if _anima_node and is_instance_valid(_anima_node):
 		_anima_node.clear()
 
+	var to_ignore = ['node', 'nodes', 'grid', 'group']
+	for key in _data.keys():
+		if not to_ignore.has(key):
+			_data.erase(key)
+
+	_target_data = _data
 	_clear_metakeys(_target_data.node)
 
 	return self