databases/postgresql??-*: Update to latest versions

The PostgreSQL Global Development Group has released an update to all
supported versions of PostgreSQL, including 18.1, 17.7, 16.11, 15.15,
14.20, and 13.23. This release fixes 2 security vulnerabilities and over
50 bugs reported over the last several months.

This is the final release of PostgreSQL 13. PostgreSQL 13 is now
end-of-life and will no longer receive security and bug fixes.

Release notes: https://www.postgresql.org/about/news/postgresql-181-177-1611-1515-1420-and-1323-released-3171/