Require that all commits in the PR are signed-off-by their git author (i.e. commit message contains
Signed-off-by: Dave Gaeddert <email@example.com>, with an email address that matches the author).
Typically used to help manage compliance with http://developercertificate.org/.
Note: This currently only checks the latest 250 commits on a PR, if you have PR’s larger than that, please let us know.
signed_off_by: required: true