This was one of the more useful things Heroku ever seeded, though the maintenance in the intervening decade has certainly eclipsed the initial effort (https://blog.heroku.com/postgresapp_the_easiest_way_to_devel...).

These days I tend to use "asdf" for my Postgres version management. It's not as friendly, but I kind of like running my services (where n < 5) in the foreground myself so I can see errors in the console with ease, and I like that asdf handles all the tools where I have exacting version requirements consistently (and even a few I don't).