Changes by @skalyan

https://github.com/skalyan91/EB-Garamond/commit/3b763030b6a865683c14e736a93619464fd4c70e and https://github.com/skalyan91/EB-Garamond/commit/0ce732fbece1b75abde9725527182d345fa6b53c
without changes to open O and uni01BE (different solutions by me) and
kerning (next commit)
Additions by @skalyan and kern o before T
More ccmp rules

Accent variants on letters with ascenders and rules for stacking
accents.
Nothing really changed here
Some marks added
New open O (uni0186)
uni01BE brought to x-height
Various changes

resulting from adding glyphs and changing between editors
Add h and k with @skalyan’s preferred accent position
Add lookup for alternate h and k