Can't change Swift version for targets (from 5 to 6)

Troubleshooting & how to
4

I think I resolved this by doing the following:

let project = Project(
    name: "Cork",
    options: .options(
        automaticSchemesOptions: .enabled(runLanguage: "en"), 
        developmentRegion: "en"
    ),
    packages: [
        .remote(url: "https://github.com/SimplyDanny/SwiftLintPlugins", requirement: .upToNextMajor(from: "0.56.2")),
    ],
    settings: .settings(
        base: ["SWIFT_VERSION": "6.0"], <-- Here
        configurations: [
            .debug(
                name: "Debug",
//                settings: [:].swiftActiveCompilationConditions(["DEBUG"]),
                xcconfig: .relativeToRoot("xcconfigs/Project.xcconfig")
            ),
            .release(
                name: "Release",
                xcconfig: .relativeToRoot("xcconfigs/Project.xcconfig")
            ),
        ]),

A big problem I had was that I have a lot of schemes, and I wanted Swift 6 to be the default for all of them. Do you think it’s a nice solution?