It’s one bug fix release and two security releases, the 7.4.9, 7.3.21, and 7.2.33. While the the first beta of PHP 8.0 have just been released. The usual comment :
All PHP 7.4 users are encouraged to upgrade to 7.4.9 version.
All PHP 7.3 users are encouraged to upgrade to 7.3.21 version.
All PHP 7.2 users are encouraged to upgrade to 7.2.33 version.
And if you are new to PHP, you should wait for PHP 8.0.0 which should be out by November 2020. More information and download at https://www.php.net/downloads