Expose a setter for Deserializer::remaining_depth?

[tisonkun]

Related -

• Add configurable recursion limit #162
• Allow increasing recursion limit #334

I can see that we control the recursion limit by an internal field remaining_depth. Now it's constantly 128. Instead of asking users to set disable_recursion_limit, I wonder if it's possible to expose a setter for Deserializer::remaining_depth so that users can retain the limitation but with a different value.