Quick dependancy is not correctly versioned #313
Description
When trying to add SwiftLint as a dependency it unfortunately fails to do so with the following message:
because SwiftLint >=0.37.0 depends on Commandant 0.17.0..<0.18.0 and Commandant >=0.16.0 depends on Quick 2.0.0..<3.0.0, SwiftLint >=0.37.0 requires Quick 2.0.0..<3.0.0.
And because siesta 1.5.1 depends on Quick 0.0.0 and no versions of siesta match the requirement 1.5.2..<2.0.0, SwiftLint is incompatible with siesta.
And because root depends on siesta 1.5.1..<2.0.0 and root depends on SwiftLint 0.39.2..<1.0.0, version solving failed.