client: replace dial with dialContext

client/v2/client.go

@@ -48,10 +48,10 @@ var DefaultRequestTimeout = 5 * time.Second
 
 var DefaultTransport CancelableTransport = &http.Transport{
 	Proxy: http.ProxyFromEnvironment,
-	Dial: (&net.Dialer{
+	DialContext: (&net.Dialer{
 		Timeout:   30 * time.Second,
 		KeepAlive: 30 * time.Second,
-	}).Dial,
+	}).DialContext,
 	TLSHandshakeTimeout: 10 * time.Second,
 }