Log Message:
harfbuzz: update to 5.2.0.

Overview of changes leading to 5.2.0
Saturday, September 17, 2022
====================================
- Fix regressions in hb-ft font functions for FT_Face’s with transformation
  matrix. (Behdad Esfahbod)
- The experimental hb-repacker API now supports splitting several GPOS subtable
  types when needed. (Garret Rieger)
- The HarfBuzz extensions to OpenType font format are now opt-in behind
  build-time flags. (Behdad Esfahbod)
- The experimental hb-subset variable fonts instantiation API can now
  instantiate more font tables and arbitrary axis locations. (Qunxin Liu)
- Unicode 15 support. (David Corbett)
- Various documentation improvements. (Behdad Esfahbod, Matthias Clasen)
- The hb-view command line tool now detects WezTerm inline images support.
  (Wez Furlong)
- Fix FreeType and ICU dependency lookup with meson. (Xavier Claessens)

- New API:
+HB_SCRIPT_KAWI
+HB_SCRIPT_NAG_MUNDARI