updating context creation in the exemple (#413)

* updating context creation in the exemple

* removing reference to make_xserver_zmq

docs/source/example/src/main.cpp

@@ -11,7 +11,9 @@
 
 #include "xeus/xkernel.hpp"
 #include "xeus/xkernel_configuration.hpp"
+
 #include "xeus-zmq/xserver_zmq.hpp"
+#include "xeus-zmq/xzmq_context.hpp"
 
 #include "custom_interpreter.hpp"
 
@@ -21,14 +23,15 @@ int main(int argc, char* argv[])
     std::string file_name = (argc == 1) ? "connection.json" : argv[2];
     xeus::xconfiguration config = xeus::load_configuration(file_name);
 
-    auto context = xeus::make_context<zmq::context_t>();
+    // Create context
+    std::unique_ptr<xeus::xcontext> context = xeus::make_zmq_context();
 
     // Create interpreter instance
     using interpreter_ptr = std::unique_ptr<custom::custom_interpreter>;
     interpreter_ptr interpreter = interpreter_ptr(new custom::custom_interpreter());
 
     // Create kernel instance and start it
-    xeus::xkernel kernel(config, xeus::get_user_name(), std::move(context), std::move(interpreter), xeus::make_xserver_zmq);
+    xeus::xkernel kernel(config, xeus::get_user_name(), std::move(context), std::move(interpreter), xeus::make_xserver_default);
     kernel.start();
 
     return 0;