Using new trait helper variables.

include/unique_resource.h

     namespace detail
     {
         template<class T, class TT>
-        using is_ntmocp_constructible = std::conditional_t<std::is_reference<TT>::value
-                                                            || !std::is_nothrow_move_constructible<TT>::value,
+        using is_ntmocp_constructible = std::conditional_t<std::is_reference_v<TT>
+                                                            || !std::is_nothrow_move_constructible_v<TT>,
                                                         typename std::is_constructible<T, const TT&>::type,
                                                         typename std::is_constructible<T, TT>::type>;