`del_files` param for `jobDelete()` method

[IlyaMatsuev]

Hello,
First of all, thank you for creating this repository. I'm using this package as part of my project.

I noticed that jobDelete() method in the client is missing an option del_files.

By default, this option is false (0), which means that deleting a job does not delete the files that have already been downloaded (https://sabnzbd.org/wiki/configuration/4.5/api#delete).

Could you please add an additional boolean parameter to this method to allow deleting related files together with a job deletion?

This is what I would expect:

jobDelete(id: string | string[], deleteFiles?: boolean): Promise<Results> {
    // ...
}

If needed, I can create an MR myself.
Thanks in advance.