Attempting to add Siesta as a dependency via the Xcode 11 File > Swift Packages > Add Package Dependency… method results in an error complaining about "incompatible dependencies"

the package siesta[https://github.com/bustoutsolutions/siesta] @ 1.5.0 contains incompatible dependencies:
quick[https://github.com/pcantrell/Quick] @ around-each

And indeed, it doesn't look like Quick (or at least that fork) is compatible with SPM?

(I am using Xcode 11.3)