Bump version to 6.8b5

Support for Django 4 (#101)

* Support for Django 4

* Change pytest-django version

* Change psycopg2 version

* Change pytest version

* Change tox version

* Change pytest-cov version

* Update circle ci jobs

* Fix ci jobs

* Update ci to postgres 12

* Allow Django 5.0

* Bump Django min version to 3.2

* Fix CI to account for >= 3.2 requirement

* Fix quote

* Remove python 3.12 for now due to distutils removal

* Remove Django upper bound

* Add back python3.6,3.7 wfs

* Downgrade dj-database-url

* Fix isnull issue from Django 4

Bump version number to 6.8b3

Bump version number to 6.8b1

Bump version number to v6.7

Bump version number to v6.6

Ignore build/ folder

Bump version to v6.4

Bump version number to 6.3

Bump version number to v6.2