The multipython merge was too big, insufficiently reviewed, and not production ready. We need to go back to status quo ante, and proceed in smaller steps. - [x] Reset `main` to commit 30ced44c of 9feb22. - [x] Delete issues #215 (check) #211 #209 #201 #199 #198 #196 #189. - [x] Reopen issues #213 #212 #207 #200 #194 #193 - [x] Cherry-pick everything from current `main` that is not related to multipython. - [ ] Extend CI to multiple Py versions, using !691 and parts of current `main`. - [ ] Cherry-pick code needed for using fabio or bumps (low priority: after next release).