- update to 10.5.0:
  * Since qpdf version 8, using object accessor methods on an
    instance of ``QPDFObjectHandle`` may create warnings if the
    object is not of the expected type. These warnings now have an
    error code of ``qpdf_e_object`` instead of
    ``qpdf_e_damaged_pdf``. Also, comments have been added to
    :file:`QPDFObjectHandle.hh` to explain in more detail what the
    behavior is. See :ref:`object-accessors` for a more in-depth
    discussion.
  * Add ``Pl_Buffer::getMallocBuffer()`` to initialize a buffer
    allocated with ``malloc()`` for better cross-language
    interoperability.
  * Overhaul error handling for the object handle functions C API.
    Some rare error conditions that would previously have caused a
    crash are now trapped and reported, and the functions that
    generate them return fallback values. See comments in the
    ``ERROR HANDLING`` section of :file:`include/qpdf/qpdf-c.h` for
    details. In particular, exceptions thrown by the underlying C++
    code when calling object accessors are caught and converted into
    errors. The errors can be checked by calling ``qpdf_has_error``.
    Use ``qpdf_silence_errors`` to prevent the error from being
    written to stderr.
  * Add ``qpdf_get_last_string_length`` to the C API to get the
    length of the last string that was returned. This is needed to
    handle strings that contain embedded null characters.
  * Add ``qpdf_oh_is_initialized`` and
    ``qpdf_oh_new_uninitialized`` to the C API to make it possible
    to work with uninitialized objects.
  * Add ``qpdf_oh_new_object`` to the C API. This allows you to
    clone an object handle.

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