Update a git hub Django package from python 2 to python 3

I'm trying to install a payment solution in my Django application (v2.0).

- In the documentation of this third party solution (Khipu.com) , they have directions for most languages but not Python.
- On Git Hub, I found an integration for this (https://github.com/misalabs/django-khipu) but it has been written for Python 2.

Job to be done:
Take the current repository (built for Python 2) and update it so that it can work with Python 3.7.6 and Django 2.0.

***IMPORTANT***: Most of the documentation it's in Spanish, (package and payment solution).