update requirements for wagtail > 4.0

[jcuotpc]

The requirements are set for wagtail < 4.0:

`install_requires=[
    "Django>=2.2,<4.1",
    "Wagtail>=2.11,<4.0",

    ],`

Is it possible to update the requirements to add wagtail 4.x and django 4.1.x?

[zerolab]

#602 will take care of this.

I will realistically have some time to do some maintenance work this Friday afternoon. Hopefully we can get a new release out as well

[chris48s]

Note: were going to either want to merge #602 first and then update #589 to bump the wagtail requirement in pyproject.toml or merge #589 first and update #602 to account for the fact setup.py no longer exists.