old_contents: """
  Store version in its own module so we can access it from both setup.py and
  __init__.
  """
  __version__ = "0.9.0"
  
new_contents: """
  Store version in its own module so we can access it from both setup.py and
  __init__.
  """
  __version__ = "1.0.0"
  
subject: Change version to 1.0.0.