Add redis, and specify in more details + add php7.4 mention (#1197)

* Add redis, and specify in more details + add php7.4 mention

* update mentioned supported PHP Versions

Co-authored-by: Daniel Fahlke <[email protected]>

Author: seansan

README.md

@@ -25,8 +25,12 @@ Note, the branches older than `1.9.4.x` and that were created before this strate
 
 ## Requirements
 
-- PHP 7.0+ (PHP 7.3 and OpenSSL extension strongly recommended)
-- MySQL 5.6+ (8.0+ Recommended)
+- PHP 7.0+ (PHP 7.3 with OpenSSL extension strongly recommended and verified compatible) (PHP 7.4 and 8.0 are supported)
+- MySQL 5.6+ (8.0+ recommended)
+- (optional) Redis 5+ (6.x recommended, latest verified compatible 6.0.7 with 20.x)
+
+- PHP 7.4 and 8.0 are supported
+- Please be aware that although OpenMage is compatible that 1 or more extensions may not be
 
 If using php 7.2+ then mcrypt needs to be disabled in php.ini or pecl to fallback on mcryptcompat and phpseclib. mcrypt is deprecated from 7.2+ onwards.