on-tag dynamic continuations should compare against the last tag #83
Description
I tend to keep tag-specific jobs in my main config, but the functionality could be the same for tags as well, but instead of comparing two commits, we compare two tags (the current, and the last).
Another argument I could add is to optionally run all workflows on tag, say, and not just rely on changes between tags to kick off workflows. E.g., say you want a new docker image and helm chart (with corresponding image tag) on tag, but you've only changed src/ (granted this could also be accomplished with ignore-includes).