dvisvgm: add mupdf dependency

[OverflowCat (ᡥᠠᡳᡤᡳᠶᠠ ᡥᠠᠯᠠ·ᠨᡝᡴᠣ 猫)]

% dvisvgm --pdf f.pdf
ERROR: To process PDF files, either Ghostscript < 10.01.0 or mutool is required.
The installed Ghostscript version 10.02.0 isn't supported.

[ryandesign (Ryan Carsten Schmidt)]

I've filed a bug report with the developers: ​https://github.com/mgieseki/dvisvgm/issues/254

[kencu (Ken)]

In the ​news file:

dvisvgm-3.0 (2022-10-16)

• added new PDF handler based on mutool to keep the PDF functionality available which can't no longer be realized with as of Ghostscript 10.1.0 due to the replacement of its PDF interpreter

So mutool is needed. That is part of mupdf, which appears to be now needed as a dep for dvisvgm.

[ryandesign (Ryan Carsten Schmidt)]

Ok yes, dvisvgm developers say Ghostscript replaced their PDF interpreter as of version 10.01.0 and dvisvgm cannot do what it needs to do with that new version and there is no hope for that to be resolved, so the port must switch from ghostscript to mupdf.

[ryandesign (Ryan Carsten Schmidt)]

The developers have clarified that dvisvgm still requires ghostscript for other functionality, so mupdf would be added to the port but ghostscript would not be removed.

[Christopher Nielsen <mascguy@…>]

In e9a2bcfd689475194396cf371e9f2080efbd20b9/macports-ports (master):

dvisvgm-devel: update to 3.3; add lib dep mupdf

See: #68646

[Christopher Nielsen <mascguy@…>]

In c37f5a66b3cfb044fa516d6fa17d1e020adabd6d/macports-ports (master):

dvisvgm: update to 3.3; add lib dep mupdf

Fixes: #68646