`django-taggit` 1.3.0 dropped today, breaking a whole lot of Wagtail stuff. This should fix it by keeping to version 1.2.0. Fixes #321.
@@ -47,6 +47,7 @@ setup(
'django-eventtools==1.0.*',
'django-bootstrap4',
'Django>2.1,<3.1', # should be the same as wagtail
+ 'django-taggit<1.3',
'geocoder>=1.38.1,<2.0',
'icalendar==4.0.*',
'wagtail==2.8.*',