v1.3.0 - UAX #29 Grapheme Cluster Support

What's New

UAX #29 Grapheme Cluster Segmentation

This release adds full Unicode grapheme cluster support, enabling proper cursor movement and text segmentation for:

• Emoji sequences: 👨‍👩‍👧 (family), 👋🏻 (skin tones), 🏳️‍🌈 (ZWJ sequences)
• Combining marks: é (e + acute), å̄ (a + ring + macron)
• Flag sequences: 🇨🇦 🇯🇵 (regional indicators)
• Hangul: 가 (precomposed) and 각 (jamo sequences)
• Indic scripts: Hindi/Devanagari conjuncts like क्ष

Highlights

• ✅ 100% pass rate on official Unicode GraphemeBreakTest.txt (766 test cases)
• Implements all break rules: GB3-GB13, GB999
• Includes GB9c for Indic conjunct sequences (new in Unicode 15.1)
• Library size: ~18KB compiled (still lightweight!)

API

// Navigate by grapheme cluster (what users perceive as "characters")
int utflite_next_grapheme(const char *text, int length, int offset);
int utflite_prev_grapheme(const char *text, int offset);

Data Tables Added

• GCB (Grapheme Cluster Break) properties: 557 ranges (~6.7KB)
• InCB (Indic Conjunct Break) Linkers: 43 codepoints
• InCB Consonants: 145 ranges (~1.2KB)

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Full Changelog: 92d6485...v1.3.0