Yes, a breaking change. There has been quite a bit of refactoring and adding of more modularity.
Now the script does not contain a single discord CDN URL, but all of them are dynamically loaded from the input3.json.
Also: The discord-cdn-refresher idea is finally getting somewhere and is now set to automatically maintain the CDN URLs.
This is in preparation of discord probably pulling the plug on external URLs without parameters by the end of the year.
Full Changelog: v2.4...v3.0