Error in npm package - how to squelch?

This expression is not constructable.
  Type 'typeof import("file:///Users/audrow/Library/Caches/deno/npm/registry.npmjs.org/sitemapper/3.2.8/sitemapper")' has no construct signatures.deno-ts(2351)

import Sitemapper from 'npm:sitemapper'

const distro = 'rolling'
const url = `https://docs.ros.org/en/${distro}/sitemap.xml`

const sitemap = new Sitemapper();
const {sites} = await sitemap.fetch(url);
console.log(sites);