Upgrade dependencies

vendor/github.com/eclipse/paho.mqtt.golang/packets/disconnect.go

@@ -1,19 +1,17 @@
 package packets
 
 import (
-	"fmt"
 	"io"
 )
 
-//DisconnectPacket is an internal representation of the fields of the
-//Disconnect MQTT packet
+// DisconnectPacket is an internal representation of the fields of the
+// Disconnect MQTT packet
 type DisconnectPacket struct {
 	FixedHeader
 }
 
 func (d *DisconnectPacket) String() string {
-	str := fmt.Sprintf("%s", d.FixedHeader)
-	return str
+	return d.FixedHeader.String()
 }
 
 func (d *DisconnectPacket) Write(w io.Writer) error {
@@ -23,14 +21,14 @@ func (d *DisconnectPacket) Write(w io.Writer) error {
 	return err
 }
 
-//Unpack decodes the details of a ControlPacket after the fixed
-//header has been read
+// Unpack decodes the details of a ControlPacket after the fixed
+// header has been read
 func (d *DisconnectPacket) Unpack(b io.Reader) error {
 	return nil
 }
 
-//Details returns a Details struct containing the Qos and
-//MessageID of this ControlPacket
+// Details returns a Details struct containing the Qos and
+// MessageID of this ControlPacket
 func (d *DisconnectPacket) Details() Details {
 	return Details{Qos: 0, MessageID: 0}
 }