Basic_Emoji is missing data

E.g. <https://unicode.org/Public/emoji/12.0/emoji-sequences.txt> includes:

```
2648..2653    ; Basic_Emoji              ; Aries                                                          #  1.1 [12] (♈..♓)
```

`\u2648` is in the output but e.g. `\u2649` isn’t.