harfbuzz/boring-expansion-spec

[`LTSH`] beyond-64k

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behdad commented

Introduce version 1 that has uint24 numGlyphs.

Why not use uint32 or even uint64 ?
It is only used to describe the number of Glyphs. It is just a variable.
I think the bigger the better, so that we will not need to consider the problem of too few Glyphs indexes for a long time.