4.59.0

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).

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