[csswg-drafts] [css-pseudo] ::first-letter should include currency (#5099)

maclockard has just created a new issue for https://github.com/w3c/csswg-drafts:

== [css-pseudo] ::first-letter should include currency ==
Currently [::first-letter](https://drafts.csswg.org/css-pseudo-4/#first-letter-pseudo) is limited to punctuation and [typographic letter unit](https://drafts.csswg.org/css-text-3/#typographic-letter-unit). This covers many use cases, however, its not uncommon to also use currency at the start of a paragraph/sentence. It would be reasonable to assume that the styles to a currency symbol, for example it seems odd for `100 dollars` to work but not `$100`. 


Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/5099 using your GitHub account