Update url to re_path in Django URL patterns

[Zinoex]

url is an alias to re_path, and url is likely to be deprecated in the future according to the Django docs.

[codecov-io]

Codecov Report

Merging #232 (cef5beb) into next (fbaf833) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             next     #232   +/-   ##
=======================================
  Coverage   82.42%   82.42%           
=======================================
  Files          30       30           
  Lines        2247     2247           
  Branches      157      157           
=======================================
  Hits         1852     1852           
  Misses        370      370           
  Partials       25       25           

Impacted Files	Coverage Δ
kiosk/urls.py	100.00% <100.00%> (ø)
stregreport/urls.py	100.00% <100.00%> (ø)
stregsystem/urls.py	75.00% <100.00%> (ø)
treo/urls.py	66.66% <100.00%> (ø)

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[joandrsn]

Could you link a source for the deprecation notice in Django docs?

[falkecarlsen]

@Zinoex have you generally tested if urls still redirect as expected? kiosk, debug toolbar, stregsystem-frontend, admin, etc?

I'd like to see the docs as well. I'm all for future-proofing but we're on Django 2.2.13 LTS, so no breaking changes should be expected.

[Zinoex]

url is literally an alias for re_path according to the Django docs. The API has been marked for future deprecation since 2.0. I haven't tested the redirects yet as I'm not aware of how, but as url is an alias, it should be a direct drop-in replacement. The implementation of url is:

def url(regex, view, kwargs=None, name=None):
    return re_path(regex, view, kwargs, name)

[Zinoex]

@cogitantium Can we complete this PR?

[falkecarlsen]

@Zinoex, sure, it probably works despite neither of us have tested it. Due to lockdown it'll only be merged onto next for now. Actual release will be whenever we're allowed back at Cassiopeia and I'm able to upgrade.