Use original character instead of id with unicode prefix

[linonetwo]

const regexgen = require('regexgen');

regexgen(['重大持股人', '重大持股方', '持股集团', '人民英雄']);

Generates /\u91CD\u5927\u6301\u80A1[\u4EBA\u65B9]|\u4EBA\u6C11\u82F1\u96C4|\u6301\u80A1\u96C6\u56E2/ which is difficult to inspect and debug, hope it can use original CJK character instead of u[0-9A-F]{4}. Thank you.