We didn't skip 2.16.90; it and 2.16.91 became available in quick succession this week!
With this update, we've removed the "Google Hangouts" audio option from accounts that had it. Google is disabling the Hangouts API effective April 25. If you use Hangouts with your meetings and wish to continue, simply start a hangout and share the URL in the meeting.
Also in this pair of releases: