Log Message:
converters/utf8proc: Update to 2.10.0

pkgsrc changes:
- License "unicode-v3" added for embedded parts derived from Unicode \ 
data files.

Upstream changelog:
- Unicode 16 support ([#277]).
- New `utf8proc_charwidth_ambiguous` function to return whether a character has
  East Asian width class A (Ambiguous) ([#270]).