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/internal/testutil/cmp.go

@@ -15,11 +15,7 @@
 package testutil
 
 import (
-	"fmt"
 	"math"
-	"reflect"
-	"unicode"
-	"unicode/utf8"
 
 	"github.com/golang/protobuf/proto"
 	"github.com/google/go-cmp/cmp"
@@ -55,45 +51,3 @@ func Diff(x, y interface{}, opts ...cmp.Option) string {
 	opts = append(opts[:len(opts):len(opts)], defaultCmpOptions...)
 	return cmp.Diff(x, y, opts...)
 }
-
-// TODO(jba): remove the code below when cmpopts becomes available.
-
-// IgnoreUnexported returns an Option that only ignores the immediate unexported
-// fields of a struct, including anonymous fields of unexported types.
-// In particular, unexported fields within the struct's exported fields
-// of struct types, including anonymous fields, will not be ignored unless the
-// type of the field itself is also passed to IgnoreUnexported.
-func IgnoreUnexported(typs ...interface{}) cmp.Option {
-	ux := newUnexportedFilter(typs...)
-	return cmp.FilterPath(ux.filter, cmp.Ignore())
-}
-
-type unexportedFilter struct{ m map[reflect.Type]bool }
-
-func newUnexportedFilter(typs ...interface{}) unexportedFilter {
-	ux := unexportedFilter{m: make(map[reflect.Type]bool)}
-	for _, typ := range typs {
-		t := reflect.TypeOf(typ)
-		if t == nil || t.Kind() != reflect.Struct {
-			panic(fmt.Sprintf("invalid struct type: %T", typ))
-		}
-		ux.m[t] = true
-	}
-	return ux
-}
-func (xf unexportedFilter) filter(p cmp.Path) bool {
-	if len(p) < 2 {
-		return false
-	}
-	sf, ok := p[len(p)-1].(cmp.StructField)
-	if !ok {
-		return false
-	}
-	return xf.m[p[len(p)-2].Type()] && !isExported(sf.Name())
-}
-
-// isExported reports whether the identifier is exported.
-func isExported(id string) bool {
-	r, _ := utf8.DecodeRuneInString(id)
-	return unicode.IsUpper(r)
-}