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/hidpp20/Feature.cpp

@@ -0,0 +1,28 @@
+#include "Feature.h"
+
+using namespace logid::backend::hidpp20;
+
+const char* Feature::UnsupportedFeature::what() const noexcept
+{
+    return "Unsupported feature";
+}
+
+uint16_t Feature::UnsupportedFeature::code() const noexcept
+{
+    return _f_id;
+}
+
+std::vector<uint8_t> Feature::callFunction(uint8_t function_id, std::vector<uint8_t>& params)
+{
+    return _device->callFunction(_index, function_id, params);
+}
+
+Feature::Feature(Device* dev, uint16_t _id) : _device (dev), _index (0xff)
+{
+    ///TODO: Set index
+}
+
+Feature::Feature(Device* dev, uint8_t _index) : _device (dev), _index (_index)
+{
+
+}