text: Title: Django >= 2.0.6 now required for python > 3.3
  Body: [This commit](https://github.com/cobrateam/splinter/commit/907208296d1936b2e8abfe21b7109cb0dad9e6a2) ([this part in particular](https://github.com/cobrateam/splinter/commit/907208296d1936b2e8abfe21b7109cb0dad9e6a2#diff-2eeaed663bd0d25b7e608891384b7298R30)) pins the django version to >= 2.0.6 if you're installing on python 3.3. As far as I know, Django 1.11 is still supported on python 3, and this dependency declaration prevents me from using django 1.11 with splinter if I want to be on python 3.3.
  
  I think the correct thing to do here is just to declare a dependency on `django >= 1.7.11` regardless of the python version, since this library supports all django versions above that, and has little to do with the python version.