bump: update libs in go.mod

go.mod

@@ -1,11 +1,13 @@
 module github.com/jar3b/nacl
 
-go 1.13
+go 1.15
 
 require (
-	github.com/golang/protobuf v1.3.3 // indirect
+	github.com/golang/protobuf v1.4.2 // indirect
-	github.com/jar3b/grawt v0.1.5
+	github.com/jar3b/grawt v0.1.6
-	github.com/nats-io/nats-streaming-server v0.17.0 // indirect
+	github.com/nats-io/nats-server/v2 v2.1.8 // indirect
-	github.com/nats-io/nats.go v1.9.1
+	github.com/nats-io/nats-streaming-server v0.18.0 // indirect
-	github.com/nats-io/stan.go v0.6.0
+	github.com/nats-io/nats.go v1.10.0
+	github.com/nats-io/stan.go v0.7.0
+	google.golang.org/protobuf v1.25.0 // indirect
 )

nacl.go

@@ -80,7 +80,7 @@ func FinalizeStan(subscriptions *[]Subscription) error {
 }
 
 func FinalizeNats(subscriptions *[]*NatsSubscription) error {
-	if StanClient == nil {
+	if NatsClient == nil {
 		return fmt.Errorf("stan client is not initialized")
 	}
 	for _, subscription := range *subscriptions {