Bumping k8s dependencies to 1.13

vendor/golang.org/x/tools/playground/local.go

@@ -7,12 +7,24 @@
 package playground
 
 import (
+	"context"
+	"fmt"
+	"io"
 	"log"
 	"net/http"
 )
 
-func client(r *http.Request) *http.Client {
-	return http.DefaultClient
+func post(ctx context.Context, url, contentType string, body io.Reader) (*http.Response, error) {
+	req, err := http.NewRequest("POST", url, body)
+	if err != nil {
+		return nil, fmt.Errorf("http.NewRequest: %v", err)
+	}
+	req.Header.Set("Content-Type", contentType)
+	return http.DefaultClient.Do(req.WithContext(ctx))
+}
+
+func contextFunc(_ *http.Request) context.Context {
+	return context.Background()
 }
 
 func report(r *http.Request, err error) {