i understand the motivation for requiring the experimental toolchain. but i think it’s important to note that making this a hard compilation requirement means even people using nightly toolchains will have a tough time using this package, because its API reference is built (on Swift Package Index, on Swiftinit, etc.) using a 5.9 compiler.
i noticed that the project’s README directs users to Swift Package Index, which (as far as i can tell) is unable to build docs for the latest swift-testing release. i would shamelessly plug Swiftinit as an alternative, but we are also in the same boat as Swift Package Index.