old_contents: __version_info__ = (1, 15, 2)
  __version__ = '.'.join(map(str, __version_info__))
  
new_contents: __version_info__ = (1, 16, 0)
  __version__ = '.'.join(map(str, __version_info__))
  
subject: Bump dev version. (might end up 2.0 tho)