Py2 -> Py3: do not inherit classes from object

https://stackoverflow.com/questions/4015417/why-do-python-classes-inherit-object/45062077

Change-Id: I15003ba591510d68f3235f71526ad5d8a456088e

pySim/transport/calypso.py

@@ -26,7 +26,7 @@ from pySim.exceptions import *
 from pySim.utils import h2b, b2h
 
 
-class L1CTLMessage(object):
+class L1CTLMessage:
 
     # Every (encoded) L1CTL message has the following structure:
     #  - msg_length (2 bytes, net order)