mod+cmd/lncli: use google.golang.org/protobuf package

itest/lnd_macaroons_test.go

@@ -9,13 +9,13 @@ import (
 	"strings"
 	"testing"
 
-	"github.com/golang/protobuf/proto"
 	"github.com/lightningnetwork/lnd/lnrpc"
 	"github.com/lightningnetwork/lnd/lntest"
 	"github.com/lightningnetwork/lnd/lntest/node"
 	"github.com/lightningnetwork/lnd/macaroons"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+	"google.golang.org/protobuf/proto"
 	"gopkg.in/macaroon.v2"
 )