Support PHP 8 version

Author: idmarinas

composer.json

@@ -21,7 +21,7 @@
     "minimum-stability": "dev",
     "prefer-stable": true,
     "require": {
-        "php": "^7.3",
+        "php": "^7.4 | ^8.0",
         "lotgd-core/occurrence-bundle": "^0.1.0",
         "idmarinas/lotgd-contracts": "^0.2.0",
         "symfony/config": "^4.4",