Refactor: autopeering events and singletons (#394)

* adapt to hive.go autopeering events changes

* add exposed function to start autopeering neighbor selection

* start autopeering neighbor selection when gossip is started

* update go modules

* Apply suggestions from code review

Co-Authored-By: Angelo Capossele <angelocapossele@gmail.com>

* fix build errors

Co-authored-by: Angelo Capossele <angelocapossele@gmail.com>