Build 54

Linux x86_64 release of Marker (egui + MuPDF).

Commit: d22ddbf0e00f1268e0b14a1125384d11dd3242b1

Runtime shared libraries typically needed on the host:
fontconfig, freetype, brotli, jbig2dec, lcms2, libjpeg, openjpeg2, zlib.

License: MIT.

What's Changed

• Math command completion inside text boxes (LT5) by @danielschafi in #78

Full Changelog: build-52...build-54