Migrate to the new CF Core API

[itssimple]

As the previous API (currently used in this library) was deprecated yesterday.

For future versions, I would recommend migrating this library to use the new API (requires API key)

More info can be found on: https://docs.curseforge.com :)

Keep up the good work!

[democat3457]

the currently used api no longer works and throws a 403 forbidden error when using it.