feat(composer): bump php

Author: Mte90

composer.json

@@ -13,7 +13,7 @@
         "php-stubs/wordpress-stubs": "*"
     },
     "require-dev": {
-        "php": "~7.4",
+        "php": "^7.4 || ^8.0",
         "php-stubs/generator": "^0.8.0"
     },
     "suggest": {