Update to wagtail 3.

hypha/apply/funds/models/applications.py

hypha/apply/users/admin_views.py

hypha/apply/users/templates/wagtailusers/users/edit.html

hypha/apply/users/templates/wagtailusers/users/index.html

hypha/apply/users/templates/wagtailusers/users/list.html

hypha/public/people/models.py

requirements.txt