Fails to build with Asio 1.33.0 / Boost 1.87

[cmorve-te]

As can be seen in https://www.boost.org/doc/libs/1_87_0/doc/html/boost_asio/history.html a bunch of deprecated facilities of ASIO have finally been removed, meaning AZMQ doesn't build any more.

I have not checked how difficult it's to fix. But at the very least "Removed deprecated alias io_service" breaks mostly everything.

[jp-pino]

I got most of it working on boost 1.87 but I'm not 100% sure how backwards compatible it is 😅

Also for some reason I can't get the coroutine tests working on 1.87

https://github.com/jp-pino/azmq

[cmorve-te]

Also for some reason I can't get the coroutine tests working on 1.87

Without even looking at those tests, could it be this (from the ASIO changelog)

Removed Boost.Coroutine-based spawn() overloads. The spawn() function now works only with the fiber support in Boost.Context.