Add more typeclasses
This adds the typeclasses from !244 (closed). See also the discussion here: https://mattermost.mpi-sws.org/iris/pl/37b8m6pmdfr3pfwwjssre3oqjc
This adds the typeclasses from !244 (closed). See also the discussion here: https://mattermost.mpi-sws.org/iris/pl/37b8m6pmdfr3pfwwjssre3oqjc