databases/postgresql14-server: Introducing PostgreSQL-14

PostgreSQL 14 brings a variety of features that help developers and
administrators deploy their data-backed applications. PostgreSQL
continues to add innovations on complex data types, including more
convenient access for JSON and support for noncontiguous ranges of data.
This latest release adds to PostgreSQL's trend on improving high
performance and distributed data workloads, with advances in connection
concurrency, high-write workloads, query parallelism and logical
replication.

Release notes: https://www.postgresql.org/docs/14/release-14.html