fix(deps): update module github.com/nats-io/stan.go to v0.10.4

Author: renovate[bot]

go.mod

@@ -16,7 +16,7 @@ require (
 	github.com/kr/text v0.2.0 // indirect
 	github.com/nats-io/nats-streaming-server v0.15.1 // indirect
 	github.com/nats-io/nats.go v1.8.1
-	github.com/nats-io/stan.go v0.5.0
+	github.com/nats-io/stan.go v0.10.4
 	github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect
 	github.com/opentracing/opentracing-go v1.2.0
 	github.com/pelletier/go-toml v1.7.0 // indirect