[charmod-norm] Pull Request: Modified references to East Asian width

aphillips has just submitted a new pull request for 
https://github.com/w3c/charmod-norm:

== Modified references to East Asian width ==
https://github.com/w3c/charmod-norm/issues/19

Removed the explicit reference to East Asian width from the table, 
using the suggested terminology 'width variation' to match UAX15.

Modified description text to be more generic. Added a reference to 
UAX11 (since nearly all width variations have their origin in East 
Asian width properties and legacy encodings: best not to ignore that) 
and also to UTR50 (which explains vertical presentation forms).

See https://github.com/w3c/charmod-norm/pull/29