Python 3.4+ / Django 1.8+ support

[eb-emilio]

Is there any plan to run travis on newer versions of Python and Django?

python:
  - "2.7"
  - "3.4"

env:
  - DJANGO_VERSION=1.7.8
  - DJANGO_VERSION=1.8.1

Code is not Python 3.7 compatible at least because it is calling unicode which is not available.

I volunteer to add this support in a pull request if you are interested.

[markfinger]

Sure, sounds good 👍

I think the code should function in both py2 and py3 as the unicode call is wrapped in __unicode__ which would only get called on py2. That being said maybe there's something in 3.7 that I'm not aware of 🤷

[markfinger]

Closed by #94

[markfinger]

Looks like there are some compatibility issues: #94.

We'll need to figure out what we're aiming to support.

Python

I'm happy to drop py2 support. Internally we've got a few projects still running on it, but they're largely in a slow-maintenance / legacy mode.

Django

From https://www.djangoproject.com/download/, it looks Django 3.x and Django 2.2 are still supported. Recommend we consolidate on those.

[markfinger]

@eb-emilio any qualms if we switch the travis config to something like

python:
  - "3.8"

env:
  - DJANGO_VERSION=2.2.16
  - DJANGO_VERSION=3.1.1

[eb-emilio]

@markfinger yes, that makes sense. Sorry about that. We are on the same boat on legacy apps but it sounds good to stop testing Python 2.x and Django 1.x since they don't have support anymore.