Update go dependencies

vendor/k8s.io/apiextensions-apiserver/pkg/features/OWNERS

@@ -0,0 +1,4 @@
+# See the OWNERS docs at https://go.k8s.io/owners
+
+approvers:
+- feature-approvers

vendor/k8s.io/apiextensions-apiserver/pkg/features/kube_features.go

@@ -0,0 +1,77 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package features
+
+import (
+	utilfeature "k8s.io/apiserver/pkg/util/feature"
+	"k8s.io/component-base/featuregate"
+)
+
+const (
+	// Every feature gate should add method here following this template:
+	//
+	// // owner: @username
+	// // alpha: v1.4
+	// MyFeature() bool
+
+	// owner: @sttts, @nikhita
+	// alpha: v1.8
+	// beta: v1.9
+	//
+	// CustomResourceValidation is a list of validation methods for CustomResources
+	CustomResourceValidation featuregate.Feature = "CustomResourceValidation"
+
+	// owner: @roycaihw, @sttts
+	// alpha: v1.14
+	//
+	// CustomResourcePublishOpenAPI enables publishing of CRD OpenAPI specs.
+	CustomResourcePublishOpenAPI featuregate.Feature = "CustomResourcePublishOpenAPI"
+
+	// owner: @sttts, @nikhita
+	// alpha: v1.10
+	// beta: v1.11
+	//
+	// CustomResourceSubresources defines the subresources for CustomResources
+	CustomResourceSubresources featuregate.Feature = "CustomResourceSubresources"
+
+	// owner: @mbohlool, @roycaihw
+	// alpha: v1.13
+	//
+	// CustomResourceWebhookConversion defines the webhook conversion for Custom Resources.
+	CustomResourceWebhookConversion featuregate.Feature = "CustomResourceWebhookConversion"
+
+	// owner: @sttts
+	// alpha: v1.15
+	//
+	// CustomResourceDefaulting enables OpenAPI defaulting in CustomResources.
+	CustomResourceDefaulting featuregate.Feature = "CustomResourceDefaulting"
+)
+
+func init() {
+	utilfeature.DefaultMutableFeatureGate.Add(defaultKubernetesFeatureGates)
+}
+
+// defaultKubernetesFeatureGates consists of all known Kubernetes-specific feature keys.
+// To add a new feature, define a key for it above and add it here. The features will be
+// available throughout Kubernetes binaries.
+var defaultKubernetesFeatureGates = map[featuregate.Feature]featuregate.FeatureSpec{
+	CustomResourceValidation:        {Default: true, PreRelease: featuregate.Beta},
+	CustomResourceSubresources:      {Default: true, PreRelease: featuregate.Beta},
+	CustomResourceWebhookConversion: {Default: true, PreRelease: featuregate.Beta},
+	CustomResourcePublishOpenAPI:    {Default: true, PreRelease: featuregate.Beta},
+	CustomResourceDefaulting:        {Default: false, PreRelease: featuregate.Alpha},
+}