message: cache_busting optional args
diff: @@ -11,7 +11,7 @@ export const defaults: Options = {
  };
  /** Implements cache busting */
  -export default function cacheBusting(options: Partial<Options>): Middleware {
  +export default function cacheBusting(options?: Partial<Options>): Middleware {
  const { regex, replacement } = { ...defaults, ...options };
  return async (request, next) => {
  