Changed and completed some features

Author: MXD-K1

main.pyi

@@ -9,6 +9,7 @@ def get_id(data: Dict) -> int: ...
 def write_to_json(file_name: str, data: Dict) -> None: ...
 def add_task(item: str, task_id: int, data: Dict) -> None: ...
 def delete_task(task_id: int, data: Dict) -> None: ...
+def update_task(task_id: int, new_task: str, data: Dict) -> None: ...
 def sort_dict_data(task_dict: Tuple[str, Dict[str, Any]]) -> None: ...
 def list_tasks(data: Dict, status: Literal["all", "in-progress", "done", "todo"]) -> None: ...
 def mark_task(data: Dict, task_id: int, new_status: Literal["in-progress", "done", "todo"]) -> None: ...