After update drush quits with error "Trait not found"

drunken monkey → made their first commit to this issue’s fork.

Thanks for the suggestion, seems sensible!
We don’t really need that trait so would also have been quite easy to make do without it for now, but I guess requiring a relatively new Drush version doesn’t do much harm, either. So, I went with that and created an MR. Please test/review!