xkcd-Script: GSUB/GPOS problem

[dummy-index]

Hello.

Latest auto-generated font files maybe have lost one's kerning & ligature information.
(Initially I thought that GSUB/GPOS tables in .sfd aren't displayed for some reason, ...)
Maybe it is caused by the method generating the .sfd file.
https://github.com/dummy-index/xkcd-font/commits/brushup

I am up to refine xkcd-script (ascend (inconsistent with em), charmap (small letter x and cross product, ...), letter spacing w/o kerning, ...)
I don't know about docker, I use python and ffpython.exe jointly. Far from pullreq.

2020/10/25
I found that this xkcd-script.sfd is in PFB format in reality!
font.generate() doesn't recognize .sfd extension.
We shuld use font.save() instead.