Update for modern django?

[perlsaiyan]

There are a few modifications to update this to more recent django versions, at a minimum:

• urls.py needs to move from url() to re_path()
• signals.py needs to drop providing_args=

Is this still under dev or does it deliberately target older django? Is there a newer replacement?

[schlunsen]

#9 fixes this, but needs checking for backwards compatibility