Summary:
All consumers of `selfsigned` ask for semver `^1.*` so we don't
need to force pin to `1.0.8`, just upgrading the lockfile is enough.

Test Plan: UI still builds.

Reviewers: zasgar, michelle, #engineering

Reviewed By: michelle, #engineering

Differential Revision: https://phab.corp.pixielabs.ai/D6688

GitOrigin-RevId: 049a47b9085739e396454cae9a4353dc8d7e9379