website: update fonts to actual 4.0 release

tooling: run psautohint on OTF/CFF fonts

fixes OS/2 table usWeightClass entry in static fonts by rounding to n…

…earest 100th. Closes #583

remove /uni2180 /uni2181 /uni2182 /uni2187 /uni2188

big commit (sorry, future me!) with 10u bolder stems of regular text …

…and greek diacritics

sync metrics keys

improvements to /alpha

tooling: pass --no-autohint to fontmake to ensure no time is wasted o…

…n autohinting

fix github CI build

adds "round" quotes & commas as ss03 (also removes unused ss05) Relat…

…ed to #570