fix(clone): then error

Author: Guillaume Chau

packages/app-backend/src/hook.js

@@ -519,7 +519,7 @@ export function installHook (target) {
       // if the object cannot / should not be cloned, don't
       if (
         // promise-like
-        typeof object.then === 'function' ||
+        (hasOwnProperty.call(object, 'then') && typeof object.then === 'function') ||
         // errors
         object instanceof Error ||
         // weakmaps