Coldtype-fontgoggles

- [Issue 267](https://github.com/justvanrossum/fontgoggles/issues/267), [PR 269](https://github.com/justvanrossum/fontgoggles/pull/269) by Khaled Hosny:
- Use HarfBuzz for extracting outlines from binary fonts
- Update uharfbuzz to 0.29.0 (which updates HarfBuzz to 5.0.0)
- Remove FreeType dependency

Practically, this means:

- Support for [`avar` 2](https://github.com/harfbuzz/boring-expansion-spec/issues/14)
- Support for more than 65536 glyphs in OTF/TTF

- Updated blackrenderer to 0.5.2, which implements variable COLRv1 ([blackrenderer issue 53](https://github.com/BlackFoundryCom/black-renderer/issues/53), [blackrenderer PR 88](https://github.com/BlackFoundryCom/black-renderer/pull/88))

- Updated blackrenderer to 0.5.1, which fixes a bug in COLRv1 handling ([blackrenderer issue 93](https://github.com/BlackFoundryCom/black-renderer/issues/93))

- Updated Unicode/unicodedata2 to 14.0.0
- Minor improvement for UFO 2 anchor handling

- Improve support for UFO 2, by adding support for UFO 2 anchors ([Issue 226](https://github.com/justvanrossum/fontgoggles/issues/226), [PR 227](https://github.com/justvanrossum/fontgoggles/pull/227))

- Make FontGoggles work on macOS 10.10, 10.11 and 10.12 again ([Issue 217](https://github.com/justvanrossum/fontgoggles/issues/217))