Print version number of device 1 on each raw dev.

Only works on HID++ >=2.0 so far. Also solves a race condition where
the wrong response can be sent to a request.

src/logid/backend/hidpp/Device.h

@@ -40,6 +40,7 @@ namespace hidpp
 
         std::string devicePath() const { return path; }
         DeviceIndex deviceIndex() const { return index; }
+        std::tuple<uint8_t, uint8_t> version() const { return _version; }
 
         void listen(); // Runs asynchronously
         void stopListening();
@@ -56,6 +57,8 @@ namespace hidpp
         DeviceIndex index;
         uint8_t supported_reports;
 
+        std::tuple<uint8_t, uint8_t> _version;
+
         std::map<std::string, std::shared_ptr<EventHandler>> event_handlers;
     };
 } } }