This release upgrades Unicode support to 13.0, which includes the following:
- The `java.lang.Character` class supports Unicode Character Database of 13.0 level, which 13.0 adds 5,930 characters, for a total of 143,859 characters. These additions include 4 new scripts, for a total of 154 scripts, as well as 55 new emoji characters.
- The `java.text.Bidi` and `java.text.Normalizer` classes support 13.0 level of Unicode Standard Annexes, #9 and #15, respectively.
- The `java.util.regex` package supports Extended Grapheme Clusters based on 13.0 level of Unicode Standard Annex #29
For more detail about Unicode 13.0, refer to the [Unicode Consortium's release note](https://unicode.org/versions/Unicode13.0.0/).