Tidy up mod (netbirdio#1492)

go.mod

@@ -62,6 +62,7 @@ require (
 	github.com/pion/logging v0.2.2
 	github.com/pion/stun/v2 v2.0.0
 	github.com/pion/transport/v3 v3.0.1
+	github.com/pion/turn/v3 v3.0.1
 	github.com/prometheus/client_golang v1.14.0
 	github.com/rs/xid v1.3.0
 	github.com/skratchdot/open-golang v0.0.0-20200116055534-eef842397966
@@ -135,7 +136,6 @@ require (
 	github.com/pion/mdns v0.0.9 // indirect
 	github.com/pion/randutil v0.1.0 // indirect
 	github.com/pion/transport/v2 v2.2.1 // indirect
-	github.com/pion/turn/v3 v3.0.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/prometheus/client_model v0.3.0 // indirect
 	github.com/prometheus/common v0.37.0 // indirect