Update Gantari font sources and binaries

[janstieler]

Regenerated OTF, TTF, variable, and webfont binaries for Gantari with updated sources. Glyphs source files were updated with new OpenType features, kerning, and glyph data, including improvements to language-specific substitutions and the addition of pnum/tnum features. Added and updated glyphs for Dcaron, Dcroat, dcaron, and dcroat. Also removed duplicate glyph definitions and made minor corrections to stem values and glyph references.