SwiftPM Package.swift with upcoming features enabled

Package.swift

// swift-tools-version: 6.0
// The swift-tools-version declares the minimum version of Swift required to build this package.

import PackageDescription

let package = Package(
    name: "MyPackage",
    products: [
        .library(name: "MyLibrary", targets: ["MyLibrary"]),
    ],
    dependencies: [
        // Dependencies declare other packages that this package depends on.
        // .package(url: /* package url */, from: "1.0.0"),
    ],
    targets: [
        .target(name: "MyLibrary", dependencies: []),
        .testTarget(name: "MyLibraryTests", dependencies: ["MyLibrary"]),
    ]
)

// List of upcoming feature flags we want to enable in all targets.
// Generally, we want to adopt new features as soon as they're available, i.e. this list should include
// all upcoming features that aren't enabled by default in our language mode.
//
// For listing all upcoming features for a given Swift language mode, see my `swift-list-features.sh` script:
// https://gist.github.com/ole/478874632fca61869928a0cc0a956972
let upcomingFeaturesPostSwift6: [SwiftSetting] = [
    // SE-0335: Introduce existential any
    // <https://github.com/apple/swift-evolution/blob/main/proposals/0335-existential-any.md>
    .enableUpcomingFeature("ExistentialAny"),
    // SE-0409: Access-level modifiers on import declarations
    // <https://github.com/swiftlang/swift-evolution/blob/main/proposals/0409-access-level-on-imports.md>
    .enableUpcomingFeature("InternalImportsByDefault"),
    // SE-0444: Member import visibility
    // <https://github.com/swiftlang/swift-evolution/blob/main/proposals/0444-member-import-visibility.md>
    .enableUpcomingFeature("MemberImportVisibility"),
]

// Enable upcoming features on all targets.
for target in package.targets {
    // Should we also exclude target.type == .system?
    guard target.type != .binary else {
        continue
    }
    var swiftSettings = target.swiftSettings ?? []
    swiftSettings.append(contentsOf: upcomingFeaturesPostSwift6)
    target.swiftSettings = swiftSettings
}