js code rejects promise incorrectly

[sirpy]

Issue description Not sure where else to report this, so i'm trying here The latest code https://www.gstatic.com/recaptcha/releases/_7Co1fh8iT2hcjvquYJ_3zSP/recaptcha__en.js

rejects a promise with reject("Timeout") but it should be reject(new Error("Timeout"))