Supply Chain Attack on polyfillo.io

[phizev]

As reported in the media, the original polyfill.js CDN has been serving malware.

#173 seems to be the quickest fix if a release were to be tagged. I have not tested it in depth.

[ultrono]

The chances of this fairly critical PR being merged are low, as the repo. appears to be dead.

I've just created a fork at https://github.com/f9webltd/invisible-recaptcha

The fork includes Laravel 11 support and this PR. My fork also drops support for old PHP and Laravel versions. I'll be tidying up my fork with GitHub workflows when I get time.