old_contents: """This file contains the current Mythril version.
  
  This file is suitable for sourcing inside POSIX shell, e.g. bash as well
  as for importing into Python.
  """
  
  __version__ = "v0.21.2"
  
new_contents: """This file contains the current Mythril version.
  
  This file is suitable for sourcing inside POSIX shell, e.g. bash as well
  as for importing into Python.
  """
  
  __version__ = "v0.21.3"
  
subject: Update __version__.py