vendor: update all dependencies to latest versions

vendor/golang.org/x/text/message/message.go

@@ -2,15 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// Package message implements formatted I/O for localized strings with functions
-// analogous to the fmt's print functions.
-//
-// These are the important differences with fmt:
-//   - Output varies per locale.
-//   - The '#' flag is used to bypass localization.
-//
-// NOTE: Under construction. See https://golang.org/design/12750-localization
-// and its corresponding proposal issue https://golang.org/issues/12750.
 package message // import "golang.org/x/text/message"
 
 import (
@@ -150,6 +141,7 @@ func lookupAndFormat(p *Printer, r Reference, a []interface{}) {
 
 // Arg implements catmsg.Renderer.
 func (p *printer) Arg(i int) interface{} { // TODO, also return "ok" bool
+	i--
 	if uint(i) < uint(len(p.args)) {
 		return p.args[i]
 	}