message: das.serializer: Don't use `forward_tuple`.
diff: @@ -100,12 +100,13 @@ namespace elle
  O>
  deserialize_switch(elle::serialization::SerializerIn& s)
  {
  - return std::forward_tuple(
  + return std::apply(
  [] (auto&& ... args) -> O
  {
  return O(std::move(args)...);
  },
  - M::Fields::template map<Serializer<O, M>::template Deserialize>::value(s));
  + M::Fields::template map<Serializer<O, M>::
  + template Deserialize>::value(s));
  }
  template <typename M>
  