Upgrade Smallslive to Latest version of django

[rajpaul]

Determine what newer version of Django we can get working locally
Then try deploying it to Heroku.
Test that the homepage and signup are still working

[rajpaul]

requirements_2023.txt
The attached requirements file is where we are with smallslive django app.
Key packages are now on -

django 2.2.28
django-oscar 2.0
djstripe 1.10

Staging URL - https://smallslive-staging.herokuapp.com/