https://lists.swift.org/pipermail/swift-evolution/Week-of-Mon-20161226/029821.html
[swift-evolution] [SwiftPM] Proposal: Add support for test-only dependencies
swift evolutionsupport fortest onlyswiftpmproposal
https://forums.swift.org/tag/swiftpm/410
Topics tagged swiftpm
Topics tagged swiftpm
topicstaggedswiftpm
https://lists.swift.org/pipermail/swift-build-dev/Week-of-Mon-20160704/000527.html
[swift-build-dev] SwiftPM PackageVersions
swiftbuilddev