- Update to version 67.1
* Unicode 13 (ICU-20893, same as in ICU 66)
+ Total of 5930 new characters
+ 4 new scripts
+ 55 new emoji characters, plus additional new sequences
+ New CJK extension, first characters in plane 3: U+30000..U+3134A
* CLDR 37
+ New language at Modern coverage: Nigerian Pidgin
+ New languages at Basic coverage: Fulah (Adlam), Maithili,
Manipuri, Santali, Sindhi (Devanagari), Sundanese
+ Region containment: EU no longer includes GB
+ Unicode 13 root collation data and Chinese data for collation and transliteration
* DateTimePatternGenerator now obeys the "hc" preference in the locale identifier (ICU-20442)
* Various other improvements for ECMA-402 conformance
* Number skeletons have a new "concise" form that can be used in MessageFormat strings (ICU-20418)
* Currency formatting options for formal and other currency display name variants (ICU-20854)
* ListFormatter: new public API to select the style & type (ICU-12863)
* ListFormatter now selects the proper “and”/“or” form for Spanish & Hebrew (ICU-21016)
* Locale ID canonicalization upgraded to implement the complete CLDR spec (ICU-20834, ICU-20272)
* LocaleMatcher: New option to ignore one-way matches (ICU-20936),
and other tweaks to the code (ICU-20916, ICU-20917) and data (from CLDR)
* acceptLanguage() reimplemented via LocaleMatcher (ICU-20700)
* Data build tool: tzdbNames.res moved from the "zone_tree" category to the "zone_supplemental" category (ICU-21073)
* Fixed uses of u8"literals" broken by the C++20 introduction of the incompatible char8_t type (ICU-20972),
* and added a few API overloads to reduce the need for reinterpret_cast (ICU-20984).
* Support for manipulating CLDR 37 unit identifiers in MeasureUnit.