outlineCompiler: vertical origin should default to OS/2.sTypoAscender
outlineCompiler: vertical origin should default to OS/2.sTypoAscender

not hhea.ascender

> By default, for each glyph the vertical origin y coordinate is set to the value of the OS/2.TypoAscender field,

https://github.com/adobe-type-tools/afdko/blob/develop/docs/OpenTypeFeatureFileSpecification.md#9h-vmtx-table

jamesgk/ufo2ft,googlefonts/ufo2ft,jamesgk/ufo2fdk,moyogo/ufo2ft,googlei18n/ufo2ft