Somes errors

[spiderneo]

Hi,

After using this lib i found some error along the way.
Maybe the errors i get are specific to the Clickup environment, but after my corrections, i could use the lib.
Primary error came when i wanted to get a task by id in a folder "folderless"

Fatal error: Uncaught TypeError: Return value of ClickUp\Objects\TaskList::folder() must be an instance of ClickUp\Objects\Folder, null returned in

This is my patch if it helps someone else
https://git.sneo.fr/-/snippets/30