move to micro v4

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

json/codec_test.go

@@ -4,7 +4,7 @@ import (
 	"bytes"
 	"testing"
 
-	"go.unistack.org/micro/v3/codec"
+	"go.unistack.org/micro/v4/codec"
 )
 
 func TestFrame(t *testing.T) {

json/json.go

@@ -1,13 +1,13 @@
 // Package json provides a json codec
-package json // import "go.unistack.org/micro-codec-segmentio/v3/json"
+package json // import "go.unistack.org/micro-codec-segmentio/v4/json"
 
 import (
 	"io"
 
 	"github.com/segmentio/encoding/json"
-	pb "go.unistack.org/micro-proto/v3/codec"
-	"go.unistack.org/micro/v3/codec"
-	rutil "go.unistack.org/micro/v3/util/reflect"
+	pb "go.unistack.org/micro-proto/v4/codec"
+	"go.unistack.org/micro/v4/codec"
+	rutil "go.unistack.org/micro/v4/util/reflect"
 )
 
 var (

json/options.go

@@ -1,7 +1,7 @@
 package json
 
 import (
-	codec "go.unistack.org/micro/v3/codec"
+	codec "go.unistack.org/micro/v4/codec"
 )
 
 type unmarshalOptionsKey struct{}