unicode updates

* Patch to handle code-points with the Ignorable property as regular
character instead of treating them as an empty string. (Me)

Signed-off-by: Gabriel Krisman Bertazi <krisman@suse.de>

unicode: Don't special case ignorable code points

We don't need to handle them separately. Instead, just let them
decompose/casefold to themselves.

Signed-off-by: Gabriel Krisman Bertazi <krisman@suse.de>