Fonttools

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

- [COLRv1] Added ``unbuildColrV1`` to deconstruct COLRv1 otTables to raw json-able
data structure; it does the reverse of ``buildColrV1`` (2171).
- [feaLib] Allow ``sub X by NULL`` sequence to delete a glyph (2170).
- [arrayTools] Fixed ``Vector`` division (2173).
- [COLRv1] Define new ``PaintSweepGradient`` (2172).
- [otTables] Moved ``Paint.Format`` enum class outside of ``Paint`` class definition,
now named ``PaintFormat``. It was clashing with paint instance ``Format`` attribute
and thus was breaking lazy load of COLR table which relies on magic ``__getattr__``
(2175).
- [COLRv1] Replace hand-coded builder functions with otData-driven dynamic
implementation (2181).
- [COLRv1] Define additional static (non-variable) Paint formats (2181).
- [subset] Added support for subsetting COLR v1 and CPAL tables (2174, 2177).
- [fontBuilder] Allow ``setupFvar`` to optionally take ``designspaceLib.AxisDescriptor``
objects. Added new ``setupAvar`` method. Support localised names for axes and
named instances (2185).

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

- [woff2] An initial off-curve point with an overlap flag now stays an off-curve
point after compression.

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

- [codecs] Handle ``errors`` parameter different from 'strict' for the custom
extended mac encodings (2137, 2132).
- [featureVars] Raise better error message when a script is missing the required
default language system (2154).
- [COLRv1] Avoid abrupt change caused by rounding ``PaintRadialGradient.c0`` when
the start circle almost touches the end circle's perimeter (2148).
- [COLRv1] Support building unlimited lists of paints as 255-ary trees of
``PaintColrLayers`` tables (2153).
- [subset] Prune redundant format-12 cmap subtables when all non-BMP characters
are dropped (2146).
- [basePen] Raise ``MissingComponentError`` instead of bare ``KeyError`` when a
referenced component is missing (2145).

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

- [COLRv1] Implemented ``PaintTranslate`` paint format (2129).
- [varLib.cff] Fixed unbound local variable error (1787).
- [otlLib] Don't crash when creating OpenType class definitions if some glyphs
occur more than once (2125).

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

- [colorLib] Speed optimization for ``LayerV1ListBuilder`` (2119).
- [mutator] Fixed missing tab in ``interpolate_cff2_metrics`` (0957dc7a).

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

- [COLRv1] Update to latest draft: added ``PaintRotate`` and ``PaintSkew`` (2118).
- [woff2] Support new ``brotlicffi`` bindings for PyPy (2117).
- [glifLib] Added ``expectContentsFile`` parameter to ``GlyphSet``, for use when
reading existing UFOs, to comply with the specification stating that a
``contents.plist`` file must exist in a glyph set (2114).
- [subset] Allow ``LangSys`` tags in ``--layout-scripts`` option (2112). For example:
``--layout-scripts=arab.dflt,arab.URD,latn``; this will keep ``DefaultLangSys``
and ``URD`` language for ``arab`` script, and all languages for ``latn`` script.
- [varLib.interpolatable] Allow UFOs to be checked; report open paths, non existant
glyphs; add a ``--json`` option to produce a machine-readable list of
incompatibilities
- [pens] Added ``QuartzPen`` to create ``CGPath`` from glyph outlines on macOS.
Requires pyobjc (2107).
- [feaLib] You can export ``FONTTOOLS_LOOKUP_DEBUGGING=1`` to enable feature file
debugging info stored in ``Debg`` table (2106).
- [otlLib] Build more efficient format 1 and format 2 contextual lookups whenever
possible (2101).