Add support for Unicode Emoji properties #541
Description
See the data files at https://unicode.org/Public/emoji/latest/ .
For which version of Emoji properties to use for each Unicode version, here is the table from Unicode UTS #51:
| Emoji Version | Date | Unicode Standard Version |
|---|---|---|
| Emoji 1.0 | 2015-06-09 | Unicode 8.0 |
| Emoji 2.0 | 2015-11-12 | Unicode 8.0 |
| Emoji 3.0 | 2016-06-03 | Unicode 9.0 |
| Emoji 4.0 | 2016-11-22 | Unicode 9.0 |
| Emoji 5.0 | 2017-06-20 | Unicode 10.0 |
| Emoji 11.0 | 2018-05-21 | Unicode 11.0 |