added php 8.1 compat

Author: mbautista

composer.json

@@ -2,7 +2,7 @@
     "name": "webgriffe/module-bootstrap-menu",
     "description": "Magento 2 module which turns top menu compatible with Bootstrap.",
     "require": {
-        "php": "^5.6|^7.0|^7.1|^7.2|^7.3|^7.4",
+        "php": "^5.6|^7.0|^7.1|^7.2|^7.3|^7.4|^8.1",
         "magento/module-theme": "*"
     },
     "suggest": {