• [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).