old_contents: from .middlewares import toolbar_middleware_factory, middleware
  from .main import setup, APP_KEY
  
  __version__ = '0.4.0'
  
  __all__ = ['setup', 'middleware', 'toolbar_middleware_factory', 'APP_KEY']
  
new_contents: from .middlewares import toolbar_middleware_factory, middleware
  from .main import setup, APP_KEY
  
  __version__ = '0.4.1a0'
  
  __all__ = ['setup', 'middleware', 'toolbar_middleware_factory', 'APP_KEY']
  
subject: Update version