Updating D beyond Unicode 2.0

[Neia Neutuladh]

On Sunday, 23 September 2018 at 21:12:13 UTC, Walter Bright wrote:
> D supports Unicode in identifiers because C and C++ do, and we 
> want to be able to interoperate with them. Extending Unicode 
> identifier support off into other directions, especially ones 
> that break such interoperability, is just doing a disservice to 
> users.

Okay, that's why you previously selected C99 as the standard for 
what characters to allow. Do you want to update to match C11? 
It's been out for the better part of a decade, after all.