Psycopg 3.2 released

After 846 commits and close to two years in the making, we are very
happy to announce the release of Psycopg 3.2!

This release adds several new features to the Psycopg 3 line, some of which are:

- support for Numpy scalar types
- easier to use notifications reception
- the possibility to run queries with PostgreSQL-format parameters
- a row factory to return a scalar from a query
- asynchronous, encrypted cancellations
- support for the many new features added to the upcoming PostgreSQL v17
- OpenSSL 3.x bundled with binary packages

A few bug bug fixes are included too, which have also been
independently released in the 3.1.20 package. Given the high level of
compatibility between 3.1 and 3.2, this could be the last release of
the 3.1 line.

For further details please check out:

- release notes: https://www.psycopg.org/psycopg3/docs/news.html
- news entry: https://www.psycopg.org/articles/2024/06/30/psycopg-32-released/

Please note that several new features in the 3.2 release require libpq
v17, but, because PostgreSQL version 17 has not been released yet,
they are not immediately available in the binary packages. In order to
use these features you will need a development version of libpq 17 on
your system and to use the Python or C source distribution. New
packages bundling libpq v17 will be released as soon as the official
PostgreSQL 17 has been released.

Thank you very much to everyone who contributed to the project,
especially to Denis Laxalde, indefatigable libpq explorer and always
available to solve challenging problems! Really thank you!

Happy hacking!

-- Daniele