Add support for official django versions

[irtazaakram]

Hi

I've made this PR that

• update all requirements
• add support for Django 4.2
• drop support for python 3.7 (EOL https://devguide.python.org/versions/#unsupported-versions)
• drop support for Django < 3.2 (EOL https://www.djangoproject.com/download/#unsupported-versions)

can we also have a new release after this PR is merged?

Thanks,