Hi! I've noticed that the stable channel for the Skype snap is more than half a year outdated:
$ snap info skype
summary: One Skype for all your devices. New features. New look. All Skype.
stable: 188.8.131.52 2018-11-13 (66) 154MB classic
insider/stable: 184.108.40.206 2019-04-18 (81) 171MB classic
installed: 220.127.116.11 (66) 154MB classic
And I was guessing when the new version (18.104.22.168 as of today: https://support.skype.com/en/faq/FA34778/release-notes-for-skype-for-windows-mac-linux-and-web) will be available and when will the stable channel be updated.