Update dependencies

transport/simple-obfs/tls.go

@@ -32,10 +32,10 @@ type TLSObfs struct {
 func (to *TLSObfs) read(b []byte, discardN int) (int, error) {
 	buf := B.Get(discardN)
 	_, err := io.ReadFull(to.Conn, buf)
+	B.Put(buf)
 	if err != nil {
 		return 0, err
 	}
-	B.Put(buf)
 
 	sizeBuf := make([]byte, 2)
 	_, err = io.ReadFull(to.Conn, sizeBuf)