Clean up dependencies

Signed-off-by: Josh Kim <[email protected]>

go.mod

@@ -1,14 +1,17 @@
 module github.com/vmware/transport-go
 
-go 1.13
+go 1.16
 
 require (
-	github.com/fatih/color v1.7.0
-	github.com/go-stomp/stomp v2.0.3+incompatible
-	github.com/google/uuid v1.1.1
+	github.com/fatih/color v1.12.0
+	github.com/go-stomp/stomp v2.1.4+incompatible
+	github.com/google/uuid v1.3.0
 	github.com/gorilla/mux v1.8.0
-	github.com/gorilla/websocket v1.4.1
+	github.com/gorilla/websocket v1.4.2
 	github.com/mattn/go-colorable v0.1.8 // indirect
-	github.com/stretchr/testify v1.4.0
-	github.com/urfave/cli v1.22.1
+	github.com/stretchr/testify v1.7.0
+	github.com/urfave/cli v1.22.5
+	github.com/vmware/transport-go/plank v0.0.0-20210816220202-47a1f3e15fb8 // indirect
 )
+
+replace github.com/vmware/transport-go/plank => ./plank