Add support for PHP 8

Author: pamil

composer.json

@@ -10,7 +10,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2 || ^8.0",
 
         "doctrine/orm": "^2.4",
         "symfony/property-access": "^3.4|^4.4|^5.0"