updated header

#!/usr/bin/env python

# Check software versions on the target

__author__ = "Elphel"

__copyright__ = "Copyright 2016, Elphel, Inc."

__license__ = "GPL"

__version__ = "3.0+"

__maintainer__ = "Oleg K Dzhimiev"

__email__ = "oleg@elphel.com"

__status__ = "Development"

'''

Copyright 2020, Elphel Inc.

SPDX-License-Identifier: GPL-3.0-or-later

Author:      Oleg Dzhimiev <oleg@elphel.com>

Description: Check software versions on the target

'''

import json

import os