Fix message type size

include/message.h

@@ -14,7 +14,7 @@
 
 #pragma pack(push, 1)
 
-typedef enum {
+enum class MessageType: uint8_t {
 
     /// @brief The initial message from remote to device to request a challenge.
     initial = 0,
@@ -28,7 +28,7 @@ typedef enum {
     /// @brief The final message with the unlock result from the device to the remote
     response = 3,
 
-} MessageType;
+};
 
 enum class MessageResult: uint8_t {