Update to make WebSocket++ work with modern Asio/Boost

[toonetown]

Back in 2018, a bunch of Asio stuff was deprecated in Asio 1.12.0/Boost 1.66.0 to reflect the Networking TS. Now that it’s been a while, many of these deprecated functions and interfaces have been removed. As of Asio 1.34.0/Boost 1.87.0, WebSocket++ will not function. This commit makes the following changes and allows for functionality modern versions of Asio/Boost:

• Use io_context instead of io_service
• Use basic_waitable_timer::expiry instead of basic_waitable_timer::expires_from_now
• Call asio::post instead of io_context::post
• Use executor_work_guard instead of io_context::work
• Use resolver::resolve directly instead of creating resolver::query
• Use resolver::results_type instead of resolver::iterator directly
• Use max_listen_connextions instead of max_connections
• Use io_context::restart instead of io_context::reset
• Use make_address instead of from_string

[toonetown]

Closing this PR in favor of doing a collaboration on #1164