Update utf8proc to v2.11.0

No other changes besides the update.

Initial Release

Includes a safe wrapper for the 'map' function, character display width, and some (but not all) character properties.
Notably, this is enough functionality for character normalization and case folding.

The utf8proc-sys bindings should be complete, since they are generated by bindgen.

Corresponds to utf8proc version v2.10.0.