Does not build

[simoncozens]

• Contains multiple glyphs with the same code point, which annoys ufo2ft>=2.32.0. Either fix the assignments or pin ufo2ft to ==2.31.0.
• fontTools' OTTableWriter.writeSubTable now has an extra offsetSize argument (in bytes), which needs to be added to the call in rcjktools (table_VarC.py", line 148, in _getSubWriter). Probably offsetSize=2? I don't know.