[JSC] Leverage ICU68's new canonicalization through C++ API
Created attachment 420252 [details] Patch
Created attachment 420273 [details] Patch
Created attachment 420275 [details] Patch
Created attachment 420276 [details] Patch
<rdar://problem/74574755>
Comment on attachment 420276 [details] Patch For now, AppleICU introduced SPI for this feature as C API and we use it. Upstreaming it to ICU is handled in ICU bug tracker. https://unicode-org.atlassian.net/browse/ICU-21506