Feature/django3

[TheLazzziest]

Update six module related code to add django 3 support.

[lnagel]

Thanks for the PR! It's great to see additional people getting involved :)
I will be reviewing this in the next few days, and then upgrading our own projects using the library to Django 3 as well. It will be a great way to validate this version.

[lnagel]

@TheLazzziest I am also thinking of dropping Python 2 support entirely. Any objections?

[TheLazzziest]

@lnagel , hi. None of them.

Actually, I would like to go a bit futher, and suggest to make this library on top of djoser and djangorestframework-simplejwt in order to focus on sso features only. What do you think?

[lnagel]

Thanks @TheLazzziest for the help with Django 3.0 compat. I did have to revert a few things after the merge, but nothing serious.

Regards to djoser and djangorestframework-simplejwt - maybe you could describe how that change would be useful? I don't yet see much benefit in such a change to add these dependencies.

[TheLazzziest]

I did a fork of your repo, and made some sort of proof of concept. Well, It's turned out that djoser doesn't need at all. Instead, djangorestframework-simplejwt has all required stuff to make the transport layer of sso in case of using jwt. Thus, I suggest to focus on implementations of different approaches to sso for django rather then trying to encompass all at once.