Added PHP-8 compatibility notice in README

Author: Geolim4

README.md

@@ -7,6 +7,7 @@ One of the biggest change is the configuration system which is now an object tha
 Also please note that the V8 requires at least PHP7.3 or higher to work properly.
 
 :exclamation: Be aware that the V8 is an **LTS** release, this means this version will be supported and maintained for at least 4 years.
+Finally, the V8 is fully compatible with PHP-8 as of version **8.0.4**
 
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 Simple Yet Powerful PHP Caching Class