artifacts: don't emit event when there's no artifacts
artifacts: don't emit event when there's no artifacts

burdandrei/nomad,nak3/nomad,dvusboy/nomad,dvusboy/nomad,hashicorp/nomad,hashicorp/nomad,hashicorp/nomad,dvusboy/nomad,hashicorp/nomad,burdandrei/nomad,nak3/nomad,dvusboy/nomad,dvusboy/nomad,burdandrei/nomad,nak3/nomad,dvusboy/nomad,burdandrei/nomad,burdandrei/nomad,nak3/nomad,hashicorp/nomad,dvusboy/nomad,nak3/nomad,burdandrei/nomad,nak3/nomad,nak3/nomad,hashicorp/nomad,burdandrei/nomad