V. 1.0.0 does not compile with boost libraries v. 1.66.0

[daniele77]

Error message:

In file included from /home/sadel/lib/aricpp/aricpp/client.h:44:0,
                 from /home/sadel/lib/aricpp/aricpp/bridge.h:37,
                 from /home/sadel/lib/aricpp/aricpp/arimodel.h:41,
                 from /home/sadel/modules/cti/pbx.h:13,
                 from /home/sadel/modules/cti/ctimanager.cpp:9:
/home/sadel/lib/aricpp/aricpp/websocket.h: In lambda function:
/home/sadel/lib/aricpp/aricpp/websocket.h:121:36: error: 'const error_code' has no member named 'failed'
                     if (error_code.failed())

It seems that boost::system::error_code does not have method failed() in v. 1.66