github has officially supported templates -- set them up

[lukasheinrich]

Description

https://github.com/diana-hep/pyhf/issues/templates/edit

maybe something for @matthewfeickert since he set up the existing ones

[matthewfeickert]

That's really slick! Thanks for bringing this up. I'll look into what's actually going on and then edit our templates to get them going. :+1:

[kratsg]