Exit watcher when stdin is closed
Exit watcher when stdin is closed

This follows the footsteps of the node CLI and other Unix utilities
brunch/brunch,Flaise/brunch,kidaa/brunch,hellyeahllc/brunch,hayesgm/brunch,rlugojr/brunch,ondreian/brunch,justinwoo/brunch,lalomartins/brunch,PeterDaveHello/brunch