Fix quit ok message not sent

Author: silvanocerza

go.mod

@@ -1,13 +1,11 @@
 module github.com/arduino/serial-discovery
 
 require (
-	github.com/arduino/go-paths-helper v1.6.1 // indirect
 	github.com/arduino/go-properties-orderedmap v1.6.0
-	github.com/arduino/pluggable-discovery-protocol-handler/v2 v2.0.1
-	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/arduino/pluggable-discovery-protocol-handler/v2 v2.0.2
 	github.com/s-urbaniak/uevent v1.0.1
-	go.bug.st/serial v1.3.1
-	golang.org/x/sys v0.0.0-20210806184541-e5e7981a1069
+	go.bug.st/serial v1.3.2
+	golang.org/x/sys v0.0.0-20210823070655-63515b42dcdf
 )
 
 go 1.16