old_contents: from distutils.core import setup
  setup(name='CO2Meter',
        version='2.0',
        py_modules=['CO2Meter'],
        url='https://github.com/heinemml/CO2Meter',
        description='Library to access USB CO2Meters'
        )
new_contents: from distutils.core import setup
  setup(name='CO2Meter',
        version='2.1',
        py_modules=['CO2Meter'],
        url='https://github.com/heinemml/CO2Meter',
        description='Library to access USB CO2Meters'
        )
  
subject: bump version to 2.1