Update contrib/restricted/boost/array to 1.81.0

contrib/restricted/boost/array/include/boost/array.hpp

@@ -44,8 +44,8 @@
 #include <iterator>
 #include <stdexcept>
 #include <boost/assert.hpp>
+#include <boost/core/swap.hpp>
 #include <boost/static_assert.hpp>
-#include <boost/swap.hpp>
 
 #include <boost/throw_exception.hpp>
 #include <algorithm>

contrib/restricted/boost/variant2/README.md

@@ -12,7 +12,7 @@ Supported compilers:
 
 * g++ 4.8 or later with `-std=c++11` or above
 * clang++ 3.9 or later with `-std=c++11` or above
-* Visual Studio 2015, 2017, 2019
+* Visual Studio 2015 or later
 
 Tested on [Github Actions](https://github.com/boostorg/variant2/actions) and
 [Appveyor](https://ci.appveyor.com/project/pdimov/variant2-fkab9).