Bumps django to 4.0 and fixes associated issues

Pipfile

@@ -10,12 +10,12 @@ name = "piwheels"
 
 [packages]
 dateparser = "~=1.1"
-django = "~=3.2"
+django = "~=4.0"
 django-cors-headers = "*"
 django-extensions = "*"
 django-filter = "~=21.1"
-django-q = "~=1.3.4"
-djangorestframework = "~=3.13.1"
+django-q = "~=1.3"
+djangorestframework = "~=3.13"
 filelock = "*"
 fuzzywuzzy = {extras = ["speedup"], version = "*"}
 gunicorn = "*"
@@ -35,8 +35,8 @@ scikit-learn="==1.0.2"
 whitenoise = "~=6.0.0"
 watchdog = "~=2.1.0"
 whoosh="~=2.7.4"
-inotifyrecursive = "~=0.3.4"
-ocrmypdf = "~=13.4.1"
+inotifyrecursive = "~=0.3"
+ocrmypdf = "~=13.4"
 tqdm = "*"
 tika = "*"
 # TODO: This will sadly also install daphne+dependencies,