chore(deps): Bump github.com/eclipse/paho.mqtt.golang

Bumps [github.com/eclipse/paho.mqtt.golang](https://github.com/eclipse/paho.mqtt.golang) from 1.3.3 to 1.3.4.
- [Release notes](https://github.com/eclipse/paho.mqtt.golang/releases)
- [Commits](https://github.com/eclipse/paho.mqtt.golang/compare/v1.3.3...v1.3.4

)
Signed-off-by: dependabot[bot] <support@github.com>

go.mod

@@ -4,7 +4,7 @@ go 1.15
 
 require (
 	github.com/armon/go-metrics v0.3.3 // indirect
-	github.com/eclipse/paho.mqtt.golang v1.3.3
+	github.com/eclipse/paho.mqtt.golang v1.3.4
 	github.com/edgexfoundry/go-mod-core-contracts/v2 v2.0.0-dev.78
 	github.com/edgexfoundry/go-mod-registry v0.1.27
 	github.com/gorilla/mux v1.8.0