chore(deps): update fonttools requirement from >=4.65.0 to >=4.66.0

[dependabot]

Updates the requirements on fonttools to permit the latest version.

Release notes

Sourced from fonttools's releases.

4.66.0

• Drop support for EOL Python 3.10; fontTools now requires Python 3.11 or later. fontTools.misc.enumTools now only re-exports enum.StrEnum and is deprecated. Explicitly test and declare support for Python 3.15 (#4183, #4196).
• [unicodedata] Update the bundled script, script extension, block and bidi-mirroring tables to Unicode 18.0.0, and require unicodedata2 18.0.0 when it is used (#4192, #4197).
• [feaLib] Support language statements listing multiple language tags, e.g. language AZE CRT;adobe-type-tools/feature_file_workshops#8dflt cannot be combined with other tags. LanguageStatement.language is still the first tag; all of them are in the new languages attribute (#4201, #4202).
• [feaLib] Fix lookups being dropped when a script/language pair is repeated within a feature block: the repeated statement replaced the language system's lookups with a fresh copy of the default ones (#4189).
• [feaLib] Raise FeatureLibError instead of UnboundLocalError when a STAT table block lacks ElidedFallbackName or ElidedFallbackNameID (#3834, #4179).
• [cffLib] Always recompile the CFF2 VarStore when saving. Previously the bytes compiled by an earlier save were reused, so a CFF2 variable font that was saved and then modified in place, e.g. by the instancer, was written with a stale VarStore next to its updated charstrings (#4199).
• [ttLib] Support static VARC fonts that omit fvar while retaining gvar or CFF2 variation data for component-internal axes: hidden axes are addressed by index and gvar can compile, decompile and round-trip through TTX without fvar, reading the axis count from a new axisCount element (#4187, #4188).
• [ttLib] Fix drawing VARC components whose condition is negated (format 5), which raised AttributeError (#4191).
• [instancer] Fix VARC axis references left stale when removing an unrelated axis, reject pinning or restricting axes referenced by VARC components, and stop culling avar2 ranges for component-internal variations, which can reach outside the font-level ranges (#4190, #4193).
• [bezierTools] Preserve exact endpoints in splitQuadraticAtT and splitCubicAtTC as well, like splitCubicAtT since 4.55.4 (#3742, #4194).
• [bezierTools] Fix ZeroDivisionError in lineLineIntersections for collinear vertical lines; they are now treated as parallel like horizontal ones (#3515, #4181).
• [subset] pyftsubset now preserves the input font's flavor (WOFF, WOFF2) when --flavor is omitted, instead of writing uncompressed sfnt data under the same extension; pass --flavor=none to force uncompressed output (#3630, #4182).
• [merge] Report incompatible unitsPerEm values by name, with the input values, instead of a bare assertion (#2844, #4184).
• [designspaceLib] Fix the type annotation and documentation of DesignSpaceDocument.default, which holds a SourceDescriptor, not a source name (#2994, #4186).
• [ttLib.sfnt] Raise TTLibError instead of AssertionError for inconsistent WOFF table, metadata and private-data lengths, so the checks also hold under python -O (#4178).
• [misc.etree] Disable entity resolution altogether on lxml >= 5.0 as well: lxml's resolve_entities="internal" still fetched external parameter entities before lxml 6.1.3, so a crafted DTD could read local files into parsed XML content (#4195).
• [cmap] Bound the expansion of format 4 segments and format 12/13 groups when decompiling, like HarfBuzz does: groups are clamped to U+10FFFF, inverted or overlapping groups are skipped with a warning, and groups mapped to the missing glyph are not expanded. A crafted font could previously exhaust memory with a single group ending at 0xFFFFFFFF (#4204).
• [varLib.avar] Escape axis names and tags when varLib.avar.unbuild emits its designspace snippet, so a crafted font cannot inject markup (#4203).

Changelog

Sourced from fonttools's changelog.

4.66.0 (released 2026-09-23)

• Drop support for EOL Python 3.10; fontTools now requires Python 3.11 or later. fontTools.misc.enumTools now only re-exports enum.StrEnum and is deprecated. Explicitly test and declare support for Python 3.15 (#4183, #4196).
• [unicodedata] Update the bundled script, script extension, block and bidi-mirroring tables to Unicode 18.0.0, and require unicodedata2 18.0.0 when it is used (#4192, #4197).
• [feaLib] Support language statements listing multiple language tags, e.g. language AZE CRT;, as Glyphs does and as proposed for the spec adobe-type-tools/feature_file_workshops#8 references are registered under every listed language. dflt cannot be combined with other tags. LanguageStatement.language is still the first tag; all of them are in the new languages attribute (#4201, #4202).
• [feaLib] Fix lookups being dropped when a script/language pair is repeated within a feature block: the repeated statement replaced the language system's lookups with a fresh copy of the default ones (#4189).
• [feaLib] Raise FeatureLibError instead of UnboundLocalError when a STAT table block lacks ElidedFallbackName or ElidedFallbackNameID (#3834, #4179).
• [cffLib] Always recompile the CFF2 VarStore when saving. Previously the bytes compiled by an earlier save were reused, so a CFF2 variable font that was saved and then modified in place, e.g. by the instancer, was written with a stale VarStore next to its updated charstrings (#4199).
• [ttLib] Support static VARC fonts that omit fvar while retaining gvar or CFF2 variation data for component-internal axes: hidden axes are addressed by index and gvar can compile, decompile and round-trip through TTX without fvar, reading the axis count from a new axisCount element (#4187, #4188).
• [ttLib] Fix drawing VARC components whose condition is negated (format 5), which raised AttributeError (#4191).
• [instancer] Fix VARC axis references left stale when removing an unrelated axis, reject pinning or restricting axes referenced by VARC components, and stop culling avar2 ranges for component-internal variations, which can reach outside the font-level ranges (#4190, #4193).
• [bezierTools] Preserve exact endpoints in splitQuadraticAtT and splitCubicAtTC as well, like splitCubicAtT since 4.55.4 (#3742, #4194).
• [bezierTools] Fix ZeroDivisionError in lineLineIntersections for collinear vertical lines; they are now treated as parallel like horizontal ones (#3515, #4181).
• [subset] pyftsubset now preserves the input font's flavor (WOFF, WOFF2) when --flavor is omitted, instead of writing uncompressed sfnt data under the same extension; pass --flavor=none to force uncompressed output (#3630, #4182).
• [merge] Report incompatible unitsPerEm values by name, with the input values, instead of a bare assertion (#2844, #4184).
• [designspaceLib] Fix the type annotation and documentation of DesignSpaceDocument.default, which holds a SourceDescriptor, not a

... (truncated)

Commits

• f54ab64 Release 4.66.0
• 18dd898 Update NEWS.rst [skip ci]
• 116a3f0 Merge pull request #4204 from fonttools/cmap12-bound-group-ranges
• 083571a [cmap] Bound format 4 and 12/13 range expansion like HarfBuzz
• 236a218 Merge pull request #4199 from tomekthewo/cff2-stale-varstore-cache
• 0fccde3 Merge pull request #4203 from insaf021/avar-unbuild-escape-axis-names
• fe7aa95 escape name-table axis names in varLib.avar.unbuild output
• 460d36e Merge pull request #4202 from fonttools/feaLib-multi-language-fixups
• a402e4e [feaLib] Test that statement_keywords covers parse_block
• 9939b30 [feaLib] Reject dflt combined with other language tags
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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 37%. Comparing base (36fff08) to head (d0c630d).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #548   +/-   ##
=====================================
  Coverage     37%     37%           
=====================================
  Files        820     820           
  Lines      40939   40939           
  Branches    9010    9010           
=====================================
  Hits       15411   15411           
  Misses     23460   23460           
  Partials    2068    2068           

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