Django 2.1 compatibility fix

[rense]

Skips adding 'sortable_by' arg for Django versions < 2.1

[coveralls]

Coverage increased (+0.09%) to 52.479% when pulling 2ec453a on rense:dev into cf3ceb8 on geex-arts:dev.

[SalahAdDin]

@f1nality

[unittolabs]

@f1nality is this PR will be approved?

[verdan]

@rense can you please make sure to fix the build so that @f1nality can approve and merge this PR? This is a blocker.

[rense]

The code is fine. I can't fix an outdated build-configuration. I created an issue for this: #346

[josefkorbel]

When can we expect this to get live?

[SalahAdDin]

We can use another fork.

[josefkorbel]

@SalahAdDin Of course but I would prefer proper pypi release.

[SalahAdDin]

We have no access to the official pypi file.

[josefkorbel]

@SalahAdDin I know. For now I solved it by using rense's fork.

[MaartenUreel]

Any update on this? We need this in the official pypi!

[SalahAdDin]

@MaartenUreel i don't know, we are waiting for @f1nality

[MaartenUreel]

OK, I purchased a commercial license, so I guess that's a feature request then :)

[SalahAdDin]

@MaartenUreel i hope.

[MaartenUreel]

If not I'll be filing a refund request at PayPal 😬

[f1nality]

Thanks for PR! and sorry for delay

[MaartenUreel]

It's an expensive PR ;-) But please keep up the good work and don't let this project go to waste.

[SalahAdDin]

@MaartenUreel I'm sorry, they deprecate it.

[MaartenUreel]

And is there any plans for a newer version or something then? Or just end of story?

[edmenendez]

End of story unless a group of us wants to get together to fork it.

[SalahAdDin]

@edmenendez, we tried before but the main responsible left me long time ago.

[f1nality]

Its not deprecated. Its just another vision on Jet. This project will continue to receive fixes for critical issues. Just no new features are planed (there was no new features long time already).