Rename prioritized_peers go files

diff --git a/prioritized_peers.go b/prioritized-peers.go
similarity index 100%
rename from prioritized_peers.go
rename to prioritized-peers.go

diff --git a/prioritized_peers_test.go b/prioritized-peers_test.go
similarity index 100%
rename from prioritized_peers_test.go
rename to prioritized-peers_test.go