Merge pull request #71 from stronk7/7.3-buster

Let's remain sticky to Redis 4.3.0 (php73-buster)

Author: stronk7

root/tmp/setup/php-extensions.sh

@@ -59,7 +59,7 @@ docker-php-ext-configure ldap --with-libdir=lib/x86_64-linux-gnu/
 docker-php-ext-install -j$(nproc) ldap
 
 # Memcached, MongoDB, Redis, APCu, igbinary.
-pecl install memcached mongodb redis apcu igbinary
+pecl install memcached mongodb redis-4.3.0 apcu igbinary
 docker-php-ext-enable memcached mongodb redis apcu igbinary
 
 # ZIP