tbump should be able to make signed tag

[AlexandreBossard]

Pretty much what's in the title. I believe it's not possible to do this, or maybe I missed something?

[dmerejkowsky]

Well, you can do something like:

tbump --no-tag NEW_VERSION
git tag -m v<NEW_VERSION> --sign

But this looks like a legit request. We could add more sections in the [git] section, like this:

[git]
sign = true