Add JWT token auth provider based on djangorestframework-simplejwt

[barseghyanartur]

As proposed/discussed in #34

[bmihelac]

@barseghyanartur thanks for this pull request.
Code looks good but I do not have an easy way to test. Do you think it would be easiest to add to jwt to example app?

[barseghyanartur]

@barseghyanartur thanks for this pull request.
Code looks good but I do not have an easy way to test. Do you think it would be easiest to add to jwt to example app?

Great! Thanks for checking. I thought tests should be sufficient, but sure - I will add a working example (later today/tomorrow) and let you know.

[barseghyanartur]

@bmihelac:

Example app is updated. Please, check.

[bmihelac]

@barseghyanartur merged, thanks!

[barseghyanartur]

@bmihelac:

Thanks! Could a npmjs release be expected one day soon? :)