Fonttools

----------------------------

- [pens] Add ``ttGlyphPen.TTGlyphPointPen`` similar to ``TTGlyphPen`` (2205).

----------------------------

- [subset] Fix ``KeyError`` after subsetting ``COLR`` table that initially contains
both v0 and v1 color glyphs when the subset only requested v1 glyphs; we were
not pruning the v0 portion of the table (2308).
- [colorLib] Set ``LayerV1List`` attribute to ``None`` when empty, it's optional
in CORLv1 (2308).

----------------------------

- [designspaceLib] Allow to use ``\\UNC`` absolute paths on Windows (2299, 2306).
- [varLib.merger] Fixed bug where ``VarLibMergeError`` was raised with incorrect
parameters (2300).
- [feaLib] Allow substituting a glyph class with ``NULL`` to delete multiple glyphs
(2303).
- [glyf] Fixed ``NameError`` exception in ``getPhantomPoints`` (2295, 2305).
- [removeOverlaps] Retry pathops.simplify after rounding path coordinates to integers
if it fails the first time using floats, to work around a rare and hard to debug
Skia bug (2288).
- [varLib] Added support for building, reading, writing and optimizing 32-bit
``ItemVariationStore`` as used in COLRv1 table (2285).
- [otBase/otConverters] Add array readers/writers for int types (2285).
- [feaLib] Allow more than one lookahead glyph/class in contextual positioning with
"value at end" (2293, 2294).
- [COLRv1] Default varIdx should be 0xFFFFFFFF (2297, 2298).
- [pens] Make RecordingPointPen actually pass on identifiers; replace asserts with
explicit ``PenError`` exception (2284).
- [mutator] Round lsb for CF2 fonts as well (2286).

----------------------------

- [feaLib] Skip references to named lookups if the lookup block definition
is empty, similarly to makeotf. This also fixes an ``AttributeError`` while
generating ``aalt`` feature (2276, 2277).
- [subset] Fixed bug with ``--no-hinting`` implementation for Device tables (2272,
2275). The previous code was alwyas dropping Device tables if no-hinting was
requested, but some Device tables (DeltaFormat=0x8000) are also used to encode
variation indices and need to be retained.
- [otBase] Fixed bug in getting the ValueRecordSize when decompiling ``MVAR``
table with ``lazy=True`` (2273, 2274).
- [varLib/glyf/gvar] Optimized and simplified ``GlyphCoordinates`` and
``TupleVariation`` classes, use ``bytearray`` where possible, refactored
phantom-points calculations. We measured about 30% speedup in total time
of loading master ttfs, building gvar, and saving (2261, 2266).
- [subset] Fixed ``AssertionError`` while pruning unused CPAL palettes when
``0xFFFF`` is present (2257, 2259).

----------------------------

- [ttLib] Remove .Format from Coverage, ClassDef, SingleSubst, LigatureSubst,
AlternateSubst, MultipleSubst (2238).
ATTENTION: This will change your TTX dumps!
- [misc.arrayTools] move Vector to its own submodule, and rewrite as a tuple
subclass (2201).
- [docs] Added a terminology section for varLib (2209).
- [varLib] Move rounding to VariationModel, to avoid error accumulation from
multiple deltas (2214)
- [varLib] Explain merge errors in more human-friendly terms (2223, 2226)
- [otlLib] Correct some documentation (2225)
- [varLib/otlLib] Allow merging into VariationFont without first saving GPOS
PairPos2 (2229)
- [subset] Improve PairPosFormat2 subsetting (2221)
- [ttLib] TTFont.save: create file on disk as late as possible (2253)
- [cffLib] Add missing CFF2 dict operators LanguageGroup and ExpansionFactor
(2249)
ATTENTION: This will change your TTX dumps!

----------------------------

- [pens] Reverted breaking change that turned ``AbstractPen`` and ``AbstractPointPen``
into abstract base classes (2164, 2198).