v0.2.1

Fixed

• Removing a key in a versioned tree would cause subsequent scan() operations
  to fail if the key evaluator requested reading data from key that has no
  current data. A safeguard has been put in place to ensure that even if
  KeyEvaluation::ReadData is returned on an index that contains no position it
  will skip the operation rather than attempting to read data from the start of
  the file.

  Updating the crate should restore access to any "broken" files.