old_contents: import os
  import sys
  
  from setuptools import find_packages, setup
  
  if sys.argv[-1] == 'publish':
      os.system('rm dist/*')
      os.system('python3 setup.py sdist')
      os.system('twine upload dist/*')
      sys.exit()
  
  packages = find_packages()
  
  setup(
      name='dartcms',
      version='0.1.19',
      description='DartCMS - open-source content management system for Django',
      long_description='DartCMS is an open-source content management system based on the popular '
                       'Django Framework. It is friendly for developers and end-users.',
      author='Dmitry Astrikov, Vyacheslav Martsinkevich',
      author_email='astrikov.d@gmail.com, master@neucom.ru',
      url='https://github.com/astrikov-d/dartcms',
      packages=packages,
      include_package_data=True,
      py_modules=['dartcms'],
      install_requires=[
          'Django>=2.0.0',
          'django-autoslug>=1.9.4',
          'django-extra-views>=0.7.1',
          'django-form-utils>=1.0.3',
          'django-gravatar2>=1.4.0',
          'django-mptt>=0.8.4',
          'django-versatileimagefield>=1.9',
          'django-widget-tweaks>=1.4.1',
          'jsonfield>=1.0.3',
          'pytils>=0.3'
      ],
      license='MIT License',
      zip_safe=False,
      keywords='django cms dartcms',
      classifiers=[
          'Development Status :: 3 - Alpha',
          'Intended Audience :: Developers',
          'Natural Language :: English',
          'Programming Language :: Python',
          'Programming Language :: Python :: 3.6',
      ]
  )
  
new_contents: import os
  import sys
  
  from setuptools import find_packages, setup
  
  if sys.argv[-1] == 'publish':
      os.system('rm dist/*')
      os.system('python3 setup.py sdist')
      os.system('twine upload dist/*')
      sys.exit()
  
  packages = find_packages()
  
  setup(
      name='dartcms',
      version='0.1.20',
      description='DartCMS - open-source content management system for Django',
      long_description='DartCMS is an open-source content management system based on the popular '
                       'Django Framework. It is friendly for developers and end-users.',
      author='Dmitry Astrikov, Vyacheslav Martsinkevich',
      author_email='astrikov.d@gmail.com, master@neucom.ru',
      url='https://github.com/astrikov-d/dartcms',
      packages=packages,
      include_package_data=True,
      py_modules=['dartcms'],
      install_requires=[
          'Django>=2.0.0',
          'django-autoslug>=1.9.4',
          'django-extra-views>=0.7.1',
          'django-form-utils>=1.0.3',
          'django-gravatar2>=1.4.0',
          'django-mptt>=0.8.4',
          'django-versatileimagefield>=1.9',
          'django-widget-tweaks>=1.4.1',
          'jsonfield>=1.0.3',
          'pytils>=0.3'
      ],
      license='MIT License',
      zip_safe=False,
      keywords='django cms dartcms',
      classifiers=[
          'Development Status :: 3 - Alpha',
          'Intended Audience :: Developers',
          'Natural Language :: English',
          'Programming Language :: Python',
          'Programming Language :: Python :: 3.6',
      ]
  )
  
subject: Change version