Pdfcropmargins

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Bug fixes:

* Changed PyMuPDF method names to match new convention (they removed deprecated
older camelcase names with 1.20.0).

* Updated PyMuPDF requirement to 1.20.0.

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Bug fixes:

* Import of ``PdfReadError`` now tries the ``errors`` module and then the ``utils`` module.

* Updated some dependency minimum versions for security reasons.

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Bug fixes:

* Workaround for a bug related to PyMuPDF attribute naming.

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New features:

* The output file path specified by the ``--outfile`` (``-o``) option can now
be a directory. In that case all output files will be written to that
directory using the default-generated names. The ``--modifyOriginal``
(``--mo``) option will also use the directory part of any output path
provided for the backup of the original.

Bug fixes:

* The ``--modifyOriginal`` (``-mo``) option now modifies the original file
even if it is in a different directory than the output file.

* A file permission/access problem in Windows that occurred with some option
combinations was fixed.

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Bug fixes:

* Minor workaround for a naming issue introduced in newer versions of PyMuPDF.

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Changes:

* PDFs are now opened with ``strict=FALSE`` in PyPDF2 ``PdfFileReader``
objects. This will attempt to repair some PDF errors in documents that
previously caused read errors.