A new `instance_version` method for Ruby expression
We'll need this in gitlab-org/quality/triage-ops#38 (closed) where we should be able to write:
This issue has regression without specifying which milestone introduced it. We're assuming it's introduced in the current version, which is #{ instance_version }, thus we're labeling ~"regression:#{ instance_version }".
Please keep regression so that we could easily search for all the regressions across version, and correct the version if it's wrong.
/label ~"regression:#{ instance_version }"