Use alignas instead of std::aligned_storage

include/cereal/types/memory.hpp

@@ -286,7 +286,10 @@ namespace cereal
     {
       // Storage type for the pointer - since we can't default construct this type,
       // we'll allocate it using std::aligned_storage and use a custom deleter
-      using AlignedStorage = typename std::aligned_storage<sizeof(T), CEREAL_ALIGNOF(T)>::type;
+      class alignas(T) AlignedStorage {
+      private:
+        std::byte data[sizeof(T)];
+      };
 
       // Valid flag - set to true once construction finishes
       //  This prevents us from calling the destructor on