New comment by ahesford on void-packages repository

https://github.com/void-linux/void-packages/issues/25342#issuecomment-703301254

Comment:
This could be resolved by declaring a virtual package that all PostgreSQL versions may provide, but I am not a Postgres user and don't know if this is a reasonable approach in general. Others should weigh in.

In the meantime, if you want to work around the hard dependency, add `ignorepkg=postgres` to a conf file in `/etc/xbps.d` (see [xbps.d(5)](https://man.voidlinux.org/xbps.d.5)) and install whichever version you prefer.