Update dependencies

Among others, this updates minio-go, so that the new "eu-west-3" zone
for AWS is supported.

vendor/cloud.google.com/go/speech/apiv1/speech_client.go

@@ -1,10 +1,10 @@
-// Copyright 2017, Google Inc. All rights reserved.
+// Copyright 2018 Google LLC
 //
 // 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
+//     https://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,
@@ -85,8 +85,8 @@ type Client struct {
 	// The call options for this service.
 	CallOptions *CallOptions
 
-	// The metadata to be sent with each request.
-	Metadata metadata.MD
+	// The x-goog-* metadata to be sent with each request.
+	xGoogMetadata metadata.MD
 }
 
 // NewClient creates a new speech client.
@@ -135,13 +135,13 @@ func (c *Client) Close() error {
 func (c *Client) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", version.Go()}, keyval...)
 	kv = append(kv, "gapic", version.Repo, "gax", gax.Version, "grpc", grpc.Version)
-	c.Metadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
+	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
 // Recognize performs synchronous speech recognition: receive results after all audio
 // has been sent and processed.
 func (c *Client) Recognize(ctx context.Context, req *speechpb.RecognizeRequest, opts ...gax.CallOption) (*speechpb.RecognizeResponse, error) {
-	ctx = insertMetadata(ctx, c.Metadata)
+	ctx = insertMetadata(ctx, c.xGoogMetadata)
 	opts = append(c.CallOptions.Recognize[0:len(c.CallOptions.Recognize):len(c.CallOptions.Recognize)], opts...)
 	var resp *speechpb.RecognizeResponse
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -160,7 +160,7 @@ func (c *Client) Recognize(ctx context.Context, req *speechpb.RecognizeRequest,
 // Operation.error or an Operation.response which contains
 // a LongRunningRecognizeResponse message.
 func (c *Client) LongRunningRecognize(ctx context.Context, req *speechpb.LongRunningRecognizeRequest, opts ...gax.CallOption) (*LongRunningRecognizeOperation, error) {
-	ctx = insertMetadata(ctx, c.Metadata)
+	ctx = insertMetadata(ctx, c.xGoogMetadata)
 	opts = append(c.CallOptions.LongRunningRecognize[0:len(c.CallOptions.LongRunningRecognize):len(c.CallOptions.LongRunningRecognize)], opts...)
 	var resp *longrunningpb.Operation
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -179,7 +179,7 @@ func (c *Client) LongRunningRecognize(ctx context.Context, req *speechpb.LongRun
 // StreamingRecognize performs bidirectional streaming speech recognition: receive results while
 // sending audio. This method is only available via the gRPC API (not REST).
 func (c *Client) StreamingRecognize(ctx context.Context, opts ...gax.CallOption) (speechpb.Speech_StreamingRecognizeClient, error) {
-	ctx = insertMetadata(ctx, c.Metadata)
+	ctx = insertMetadata(ctx, c.xGoogMetadata)
 	opts = append(c.CallOptions.StreamingRecognize[0:len(c.CallOptions.StreamingRecognize):len(c.CallOptions.StreamingRecognize)], opts...)
 	var resp speechpb.Speech_StreamingRecognizeClient
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {