Moved minimum php version to 8.1

All PostgreSQL calls are now Connection/Resource object types and not
resource
All methods have parameter type set

www/composer.json

@@ -24,6 +24,7 @@
         }
     },
     "require": {
-        "egrajp/smarty-extended": "^4.3"
+        "egrajp/smarty-extended": "^4.3",
+        "php": ">=8.1"
     }
 }