• Removed hard-dependency on pyfilesystem2 (fs package) from fonttools[ufo] extra. This is replaced by the fontTools.misc.filesystem package, a stdlib-only, drop-in replacement for the subset of the pyfilesystem2's API used by fontTools.ufoLib. The latter should continue to work with the upstream fs (we even test with/without). However, clients who wish to continue using fs can do so by depending on it directly instead of via the fonttools[ufo] extra (#3885, #3620).
• [xmlWriter] Replace illegal XML characters (e.g. control or non-characters) with "?" when dumping to ttx (#3868, #71).
• [varLib.hvar] Fixed vertical metrics fields copy/pasta error (#3884).
• Micro optimizations in ttLib and sstruct modules (#3878, #3879).
• [unicodedata] Add Garay script to RTL_SCRIPTS (#3882).
• [roundingPen] Remove unreliable kwarg usage. Argument names aren’t consistent among point pens’ .addComponent() implementations, in particular baseGlyphName vs glyphName (#3880).