Knox 4.0 update

[bernie-haxx]

The token variable was creating a tuple consisting of the token and instance variable based on the knox 4.0 update. I can take my time in creating a whole token and expiry generation for the knox system if you let me.

[coveralls]

Coverage decreased (-0.3%) to 91.973% when pulling 8f90a12 on Benard18:master into 6ba9a67 on st4lk:master.

[st4lk]

Fixed by #112

I don't think we need to pass knox_settings.TOKEN_TTL here since it is the default value:

https://github.com/James1345/django-rest-knox/blob/4.1.0/knox/models.py#L12

class AuthTokenManager(models.Manager):
    def create(self, user, expiry=knox_settings.TOKEN_TTL)
        ...

[bernie-haxx]

Ooh sure.....saw the fix too.