build issue with boost >=1.70

[ilejn]

                 from /home/ilejn/projects/.../HttpServer.cpp:1:
/home/ilejn/projects/.../3rdparty/crow/include/crow/socket_adaptors.h: In member function ‘boost::asio::io_service& crow::SocketAdaptor::get_io_service()’:
/home/ilejn/projects/.../3rdparty/crow/include/crow/socket_adaptors.h:22:28: error: ‘boost::asio::ip::tcp::socket’ {aka ‘class boost::asio::basic_stream_socket<boost::asio::ip::tcp>’} has no member named ‘get_io_service’
   22 |             return socket_.get_io_service();

[mrozigor]

There are already couple of issues in this project with boost lib version. Also couple of pull request - you can choose one of them ;) On my fork those changes are merged, so feel free to download updated version.

[ilejn]

Thanks,
no luck in making my own PR ;(

[zh794390558]

#343