fix: 补全 JmOption 面向对象封装方法的返回值

Author: hect0x7

src/jmcomic/jm_option.py

@@ -584,15 +584,15 @@ def download_album(self,
                        **kwargs,
                        ):
         from .api import download_album
-        download_album(album_id, self, *args, **kwargs)
+        return download_album(album_id, self, *args, **kwargs)
 
     def download_photo(self,
                        photo_id,
                        *args,
                        **kwargs,
                        ):
         from .api import download_photo
-        download_photo(photo_id, self, *args, **kwargs)
+        return download_photo(photo_id, self, *args, **kwargs)
 
     # 下面的方法为调用插件提供支持