On 17th of July, Noah Misch committed patch: Implement the FILTER clause for aggregate function calls. This is SQL-standard with a few extensions, namely support for subqueries and outer references in clause expressions. catversion bump due to change in Aggref and WindowFunc. David Fetter, reviewed ...

On 29th of July, Tom Lane committed patch written by David E. Wheeler, which added new contrib module: citext.

Another patch from Pavel Stehule - committed by Tom Lane. This patch adds CASE construction to pl/PgSQL: