ble.lwp3.bytecodes: Fix IODeviceCapabilities enum

Fix failing on newer versions of Python which are more strict about
empty enums.

Fixes the following error:

    TypeError: <flag 'IODeviceCapabilities'> has no members; specify `names=()` if you meant to create a new, empty, enum

Author: dlech

pybricksdev/ble/lwp3/bytecodes.py

@@ -1008,7 +1008,7 @@ class IODeviceCapabilities(IntFlag):
     Sensor capabilities flags. (48-bit)
     """
 
-    pass
+    names = ()
 
 
 class DataFormat(IntEnum):