Make the struct in the default template public (#3454)
Make the struct in the default template public (#3454)

This makes it easier to use it from clients which makes for a better default experience.

rdar://77110377
apple/swift-package-manager,apple/swift-package-manager,apple/swift-package-manager,apple/swift-package-manager,abertelrud/swift-package-manager,abertelrud/swift-package-manager,abertelrud/swift-package-manager,abertelrud/swift-package-manager,apple/swift-package-manager,abertelrud/swift-package-manager