Unicode 15.1

update Unicode properties data, scripts & script properties, collation, IDNA, confusables, identifier type/status, ...

New properties, which may not all make it into ICU 74:

• Two of the new ideographic description characters function as unary operators, which necessitated introduction of a new binary property: IDS_Unary_Operator.

  There are two new properties, ID_Compat_Math_Start and ID_Compat_Math_Continue, for the new Mathematical Compatibility Notation Profile in UAX #31.

  There is a new property NFKC_Simple_Casefold which establishes another normalization form like NFKC_Casefold does. The new one uses Simple_Case_Folding mappings rather than full Case_Folding mappings. This is intended for use in systems that support case-insensitive identifiers based on simple (1:1) case folding mappings.

• There is a new grapheme cluster segmentation rule GB9c in UAX #29 which refers to a new enumerated property Indic_Conjunct_Break.

https://unicode-org.github.io/icu/processes/unicode-update.html

https://www.unicode.org/versions/Unicode15.1.0/