Outdated Boost Asio Header - boost/asio/io_service.hpp Missing in Boost 1.88

[derekpickell]

boost::asio::io_service was replaced by boost::asio::io_context for my version of Boost (1.88).

Replaced instances of boost::asio::io_service ioservice with boost::asio::io_context io_context and seems to run fine.

I'm managing my own library versions/environment so not sure if this is useful or not but I can submit a PR.

• Derek