- Update to 3.13:
* Improvements to Greek and Cyrillic glyphs #240
* New stylistic set ss04 which is almost identical to ss02 with
the exception of no slashed zero #252
* Fixes interpolation issues with several diacritics in the light weights
* Removes codepoint mappings for some math-related enclosed glyphs
that would be too large when using the circle-enclosed glyphs #250
* Various improvements and adjustments to glyph shapes, spacing and kerning
* Improves OpenType feature name metadata