allow PHP8

Author: twin-elements

composer.json

@@ -10,7 +10,7 @@
         }
     ],
     "require": {
-        "php": "^7.1.3",
+        "php": "^7.1 || ^8.0",
         "symfony/framework-bundle": "^4.4 || ^5.4",
         "twin-elements/admin-bundle": "^1.11",
         "twin-elements/seo-bundle": "^1.0"