Update rerun to remove celluloid as dependency

After sidekiq 4 migration, we no longer need celluloid. rerun recent version also removed it from its dependency, so by getting this MR merged, we can solve #3797 (closed)

Reassigned to @dzaporozhets

Status changed to merged

mentioned in commit 76642d7a

mentioned in commit nolith/gitlab-ce@bfab73b0

mentioned in commit nolith/gitlab-ce@8da103e4