update vendor

Signed-off-by: Roland.Ma <rolandma@yunify.com>

vendor/sigs.k8s.io/kustomize/kyaml/yaml/walk/visitor.go

@@ -0,0 +1,28 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package walk
+
+import (
+	"sigs.k8s.io/kustomize/kyaml/openapi"
+	"sigs.k8s.io/kustomize/kyaml/yaml"
+)
+
+type ListKind int32
+
+const (
+	AssociativeList ListKind = 1 + iota
+	NonAssociateList
+)
+
+// Visitor is invoked by walk with source and destination node pairs
+type Visitor interface {
+	VisitMap(Sources, *openapi.ResourceSchema) (*yaml.RNode, error)
+
+	VisitScalar(Sources, *openapi.ResourceSchema) (*yaml.RNode, error)
+
+	VisitList(Sources, *openapi.ResourceSchema, ListKind) (*yaml.RNode, error)
+}
+
+// ClearNode is returned if GrepFilter should do nothing after calling Set
+var ClearNode *yaml.RNode