package/php: bump version to 7.4.20

Changelog: https://www.php.net/ChangeLog-7.php#7.4.20

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit f42a500e41ff294aaed3800b159d0cc4b966d999)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/php/php.hash

@@ -1,5 +1,5 @@
 # From https://www.php.net/downloads.php
-sha256  6c17172c4a411ccb694d9752de899bb63c72a0a3ebe5089116bc13658a1467b2  php-7.4.19.tar.xz
+sha256  1fa46ca6790d780bf2cb48961df65f0ca3640c4533f0bca743cd61b71cb66335  php-7.4.20.tar.xz
 
 # License file
 sha256  a188db807d711536f71e27b7d36879d63480f7994dc18adc08e624b3c5430fff  LICENSE

package/php/php.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-PHP_VERSION = 7.4.19
+PHP_VERSION = 7.4.20
 PHP_SITE = http://www.php.net/distributions
 PHP_SOURCE = php-$(PHP_VERSION).tar.xz
 PHP_INSTALL_STAGING = YES