Please use https://github.com/cormacrelf/CiteprocRsKit directly instead.

This is a binary distribution of CiteprocRsKit. You can install this directly with SwiftPM by using this repo (https://github.com/cormacrelf/CiteprocRsKit-Binary) as a dependency.

// set TAG to an appropriate version etc
.package(name: "CiteprocRsKit", url:
"https://github.com/cormacrelf/CiteprocRsKit-Binary", from: "TAG"),

Or add it via the Xcode UI.