vendors/tempy.js/braceExpand
    function braceExpand(pattern, options) {
      if (!options) {
        if (this instanceof Minimatch) {
          options = this.options;
        } else {
          options = {};
        }
      }
      pattern = typeof pattern === "undefined" ? this.pattern : pattern;
      assertValidPattern(pattern);
      if (options.nobrace || !/\{(?:(?!\{).)*\}/.test(pattern)) {
        return [pattern];
      }
      return expand(pattern);
    }