Migrate to new networking.k8s.io/v1beta1 package

internal/ingress/annotations/class/main_test.go

@@ -20,7 +20,7 @@ import (
 	"testing"
 
 	api "k8s.io/api/core/v1"
-	extensions "k8s.io/api/extensions/v1beta1"
+	networking "k8s.io/api/networking/v1beta1"
 	meta_v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 )
 
@@ -47,7 +47,7 @@ func TestIsValidClass(t *testing.T) {
 		{"custom", "nginx", "nginx", false},
 	}
 
-	ing := &extensions.Ingress{
+	ing := &networking.Ingress{
 		ObjectMeta: meta_v1.ObjectMeta{
 			Name:      "foo",
 			Namespace: api.NamespaceDefault,