From the changelog:
The service template parameters, and the corresponding classes, are disabled by default. For example, instead of basic_socket<Protocol, SocketService> we now have simply basic_socket. The old interface can be enabled by defining the BOOST_ASIO_ENABLE_OLD_SERVICES macro.
Specifically, the new interfaces as specified in http://www.boost.org/doc/libs/1_66_0/doc/html/boost_asio/net_ts.html
My pull request #13 sticks a plaster over this by adding BOOST_ASIO_ENABLE_OLD_SERVICES but really it should be migrated to use the new interfaces.