How to download and unzip gz files in Node.js

You might know that I'm running a Twitter bot called @randomMDN. Every few hours, the bot fetches the sitemap of MDN and tweets a random page. It was running without a problem for two years, but recently it broke. The reason was that MDN changed the sitemap from https://developer.mozilla.org/sitemaps/en-US/sitemap.xml to https://developer.mozilla.org/sitemaps/en-US/sitemap.xml.gz.