function escapeDots(str, arr, opts) {
  if (!/[^\\]\..+\\\./.test(str)) {
    return arr.concat(str.split('\\').join(''));
  } else {
    str = str.split('\\.').join('__ESC_DOT__');
    return map(braces(str, arr, opts), function(ele) {
      return ele.split('__ESC_DOT__').join('.');
    });
  }
}
get emoji name from code
@param  {string} emoji
@param  {boolean} includeColons should the result include the ::
@return {string}