Next cloud dones't work properly with gnome-todo

Not sure if nextcloud isn’t using standard webDAV or whether it’s the failure of gnome-todo but I cannot edit events. They can be created and marked as complete, just fine, but if you want to raise the priority, you’re out of luck.

there’s not a whole ton of people working on todo, but if a nextcloud folk wanted to hop in and fix that it would be awesome.