函数：toUTF8 unicode 转 utf8

函数名称：unicode 转 utf8

函数功能：转码，unicode 转 utf8

函数用例

--unicode 转 utf8
local ts = require "ts"
local tmp = ts.json.totable([[{"toUTF8":"\u6211\u7231\u5a1c\u5a1c"}]])
dialog(tmp["toUTF8"],0)