build: Use platformdirs instead of deprecated appdirs

pyproject.toml

@@ -27,8 +27,8 @@ classifiers = [
     "Typing :: Typed",
 ]
 dependencies = [
-    "appdirs>=1.4",
     "loguru>=0.5",
+    "platformdirs>=4.2",
     "requests>=2.19",
     "tomli>=2.0; python_version < '3.11'",
     "websocket-client>=0.58",

src/aria2p/utils.py

@@ -12,8 +12,8 @@
 from pathlib import Path
 from typing import TYPE_CHECKING, Any
 
-from appdirs import user_config_dir
 from loguru import logger
+from platformdirs import user_config_dir
 
 if TYPE_CHECKING:
     from datetime import timedelta