update requirement of php to v8.0 or higher

Author: Machometec

composer.json

@@ -10,10 +10,10 @@
         }
     ],
     "require": {
-        "php": "7.4 - 8.1",
+        "php": "^8.0",
         "devnet/core": "1.0.*",
         "devnet/cli": "1.0.*",
         "devnet/web": "1.0.*",
         "devnet/entity": "1.0.*"
     }
-}
+}