vendors/tempy.js/toRange
    var toRange = (a, b, isNumbers, options) => {
      if (isNumbers) {
        return toRegexRange(a, b, __spreadValues({ wrap: false }, options));
      }
      let start = String.fromCharCode(a);
      if (a === b)
        return start;
      let stop = String.fromCharCode(b);
      return `[${start}-${stop}]`;
    };