* The ‘height’ needs to be negated since the API returns “distance from
  top to bottom side”.
* Similarly, the ‘y_offset‘ needs to be added to the height to get the
  ‘y_bearing’, since sbix’s offset is “the point in the glyph relative
  to its lower-left corner which corresponds to the origin” while
  ‘y_bearing’ is the “top side of glyph from origin”.

With these changes the sbix glyph metrics return values similar to other
tables, as they were otherwise unusable.

Fixes https://github.com/harfbuzz/harfbuzz/pull/1432

https://github.com/harfbuzz/harfbuzz/pull/1799

To HB_OT_MATH_GLYPH_PART_FLAG_EXTENDER.  Added a deprecated macro.

Fixes https://github.com/harfbuzz/harfbuzz/issues/1734

nothing important, fixing a copy paste error inconsistency

Ignore gvar/MVAR/HVAR table
add support for --nameIDs=* option

[subset] Use hb_subset_input_t inside of subset_options_t so that input defaults are shared between the library and cli.

https://github.com/grigorig/ucdn/issues/23

Also move the implementation of some methods from the .cc to the .hh

Add unit test and integration test