ICU LogoUnicode® ICU 66 has been released. It updates to

Unicode 13
, including new characters, scripts, emoji, and corresponding API
constants. It also updates to
with Unicode 13 updates and bug fixes.

These new, extra Q1 releases are for integration by vendors that
could not otherwise release their products with the newest version of Unicode.
These are low-impact releases with no other significant feature additions or
implementation changes. The next feature releases will be CLDR 37 and ICU 67,
scheduled for 2020 April.

For details please see