- check out https://support.skype.com/en/faq/FA34778/release-notes-for-skype-for-windows-mac-linux-and-web for release notes for the latest version
- get size and SHA256 of target version from https://repo.skype.com/deb/pool/main/s/skypeforlinux/ with
curl -v <link.to.deb> | sha256sum - update
com.skype.Client.json's lastextra-datasection with new URL, size and SHA256 - add a top
<release>entry under<releases>to thecom.skype.Client.appdata.xml(dateattribute value comes from release notes above) - commit, push & create a PR!