Regress to io_service rather than io_context

include/spinscale/co/promises.h

@@ -10,7 +10,6 @@
 #include <type_traits>
 #include <utility>
 
-#include <boost/asio/io_context.hpp>
 #include <boost/asio/io_service.hpp>
 #include <boost/asio/post.hpp>
 
@@ -191,19 +190,19 @@ struct PostingPromise
 	:	public std::suspend_always
 	{
 		InitialSuspendPostingInvoker(
-			boost::asio::io_context &targetIoContextIn,
+			boost::asio::io_service &targetIoServiceIn,
 			std::coroutine_handle<> targetSchedHandleIn) noexcept
-		:	targetIoContext(targetIoContextIn),
+		:	targetIoService(targetIoServiceIn),
 		targetSchedHandle(targetSchedHandleIn)
 		{}
 
 		bool await_suspend(std::coroutine_handle<> const) noexcept
 		{
-			boost::asio::post(targetIoContext, targetSchedHandle);
+			boost::asio::post(targetIoService, targetSchedHandle);
 			return true;
 		}
 
-		boost::asio::io_context &targetIoContext;
+		boost::asio::io_service &targetIoService;
 		std::coroutine_handle<> targetSchedHandle;
 	};
 
@@ -353,7 +352,7 @@ struct TaggedPostingPromise
 		std::cout << __func__ << ": " << std::this_thread::get_id() << " Returning InitialSuspendPostingInvoker.\n";
 #endif
 		return typename PostingPromise<T>::InitialSuspendPostingInvoker(
-			ThreadTag::io_context(),
+			ThreadTag::io_service(),
 			this->selfSchedHandle);
 	}
 };