Update licence file

Add version number

LICENSE

 BSD 3-Clause License
 
-Copyright (c) 2021, SOLEIL Synchrotron
+Copyright (c) 2021-2023, SOLEIL Synchrotron
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without

mbtrack2/__init__.py

 # -*- coding: utf-8 -*-
+__version__="0.4"
 from mbtrack2.tracking import *
 from mbtrack2.impedance import *
 from mbtrack2.instability import *