SSH commit signature validation

[devinemke]

GitHub now allows SSH signing of commits (along with GPG + S/MIME) as described here.

The current version of Sublime Merge (Build 2077) shows SSH signed commits as “Invalid”.

These same signed commits are shown as valid locally when running:
git show --show-signature

and displayed as “Verified” after being pushed up to GitHub.

[jfcherng]

Issue: Signature validation does not work with gpg.format=ssh