PHP compatibility warnings/errors (v7.2)

I ran this plugin through the PHP Compatibility checker, against PHP v7.2.

There were 5 warnings, 49 errors. All of them are in code that is in the vendor directory under the google-api-client directory, phpseclib and guzzlehttp. I suppose as long as we are not using the Google API stuff, we shouldn’t be concerned. I wonder, though, if newer versions of those libraries exist that are fully PHP 7.2 compatible, or if some of this code (the bulk is regarding mcrypt) is simply conditional code, I haven’t examined all of it.