Upgrading Postgresql between major version requires previous version to be installed[1]. With auto-cleanup, when new version is installed, old will be uninstall

Upgrading Postgresql between major version requires previous version to be installed[1]. With auto-cleanup, when new version is installed, old will be uninstalled automatically, unless they added some exclusion mechanism for it, but I don't see anything about it in "postgres" formula[2]. [1] https://www.postgresql.org/docs/11/pgupgrade.html https://www.postgresql.org/docs/11/pgupgrade.html [2] https://github.com/Homebrew/homebrew-core/blob/master/Formula/postgresql.rb https://github.com/Homebrew/homebrew-core/blob/master/Formul...