Fix client pkg linter warning

client/message.go

@@ -28,8 +28,8 @@ func (api *GoShimmerAPI) FindMessageByID(base58EncodedIDs []string) (*webapi_mes
 	return res, nil
 }
 
+// SendPayload send a message with the given payload.
 func (api *GoShimmerAPI) SendPayload(payload []byte) (string, error) {
-
 	res := &webapi_message.MessageResponse{}
 	if err := api.do(http.MethodPost, routeSendPayload,
 		&webapi_message.MessageRequest{Payload: payload}, res); err != nil {

go.mod

@@ -13,7 +13,7 @@ require (
 	github.com/go-ole/go-ole v1.2.4 // indirect
 	github.com/gobuffalo/packr/v2 v2.7.1
 	github.com/golang/protobuf v1.3.5
-	github.com/google/go-cmp v0.4.1
+	github.com/google/go-cmp v0.4.1 // indirect
 	github.com/gorilla/websocket v1.4.1
 	github.com/iotaledger/hive.go v0.0.0-20200618165014-e1cb7f9a0afb
 	github.com/iotaledger/iota.go v1.0.0-beta.14