Add dependency name when resolving for swift >= 5.2

[f-meloni]

On the latest xcode you get

dependency 'DangerSwiftProse' in target '_dangerfile_imports' requires explicit declaration; provide the name of the package dependency with '.package(name: "DangerSwiftProse", url: "https://github.com/f-meloni/danger-swift-prose.git", from: "1.0.0")'

when you try to resolve a dependency with the Danger dependencies resolver