old_contents: __version__ = version = "0.9.0"
  version_info = tuple([int(d) for d in version.split("-")[0].split(".")])
  
new_contents: __version__ = version = "0.10.0a0"
  version_info = tuple([int(d) for d in version.split("-")[0].split(".")])
  
subject: Bump to 0.10.0a0