// Copyright (c) 2018 Adam Butcher, Antony Polukhin
-// Copyright (c) 2019-2020 Antony Polukhin
+// Copyright (c) 2019-2022 Antony Polukhin
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)