- Update to 6.9:
* Many mathematical operator in Libertinus Math were scaled up
and redesigned for better use in math mode.
* Libertinus Math now has fraktur alphabets (copied from STIX
Two Math font) and sans serif italic Greek (slanted from the
upright version).
* Overline mark (U+0305) no longer make i and j dotless.
* Overline mark should be placed higher than glyph ascenders.
* Fonts are now autohinted with Adobe’s psautohint instead of
FontForge’s autohinter.
* Libertinus Keyboard had the German keys Bild misspelled as
Build in both glyph name and ligature string.
* Several changes to glyph names for consistency and accuracy.
* Several minor reorganization to the OpenType features.
- Update URL
- Run through spec-cleaner

- Update to 6.8:
* Fix missing “math” OpenType script from Libertinus Math.
* Add \QED symbol to Libertinus Math, also add Add ⦇ (U+2987) and ⦈ (U+2988).
* Fix misencoded glyphs in Libertinus Serif Semibold Italic.
* Make digits fitted in Libertinus Serif Initials font, and drop incomplete
Greek, Cyrillic and Hebrew support.
* Add U+AB52 and U+A793 to Libertinus Serif Regular.
- Update to 6.7
* Add Cyrillic to Libertinus Serif Bold Italic.
* Many character additions to Libertinus Math.
* Set “is extended shape” flag to relevant Libertinus Math glyphs to fix script
position on large symbols in Microsoft Word.
* Improve \coloneq and \eqcolon by increasing the space between the colon and