<i18n dev> [13] RFR: 8221431: Support for Unicode 12.1

[naoto.sato at oracle.com]

Hi,

Please review the changes to the following issue:

https://bugs.openjdk.java.net/browse/JDK-8221431

The proposed CSR and changeset are located at:

https://bugs.openjdk.java.net/browse/JDK-8222771
https://cr.openjdk.java.net/~naoto/8221431/webrev.03/

This enhancement incorporates support for the recently released Unicode 
version 12.1. Besides the usual addition of new characters/scripts, this 
enhancement includes normalization of the Japanese Reiwa era character 
(U+32FF), and up-to-date extended grapheme cluster support in regex package.

Naoto