vendor: update all dependencies to latest versions

vendor/cloud.google.com/go/storage/reader.go

@@ -28,6 +28,7 @@ type Reader struct {
 	body         io.ReadCloser
 	remain, size int64
 	contentType  string
+	cacheControl string
 	checkCRC     bool   // should we check the CRC?
 	wantCRC      uint32 // the CRC32c value the server sent in the header
 	gotCRC       uint32 // running crc
@@ -72,3 +73,8 @@ func (r *Reader) Remain() int64 {
 func (r *Reader) ContentType() string {
 	return r.contentType
 }
+
+// CacheControl returns the cache control of the object.
+func (r *Reader) CacheControl() string {
+	return r.cacheControl
+}