old_contents: from .csr import skeleton_to_csgraph, branch_statistics, summarise
  
  __all__ = ['skeleton_to_csgraph',
             'branch_statistics',
             'summarise']
new_contents: from .csr import skeleton_to_csgraph, branch_statistics, summarise
  
  __version__ = '0.1-dev'
  
  __all__ = ['skeleton_to_csgraph',
             'branch_statistics',
             'summarise']
  
subject: Add version info to package init