Update Package@swift-5.9.swift platform info

[MartinP7r]

Fixes #

swift package CLI throws a warning that v11 is too hold for swift-5.9

warning: 'zipfoundation': /Package@swift-5.9.swift:23:32: warning: 'v11' is deprecated: iOS 12.0 is the oldest supported version
        .macOS(.v10_13), .iOS(.v11), .tvOS(.v11), .watchOS(.v4), .visionOS(.v1)
                               ^
/Package@swift-5.9.swift:23:45: warning: 'v11' is deprecated: tvOS 12.0 is the oldest supported version
        .macOS(.v10_13), .iOS(.v11), .tvOS(.v11), .watchOS(.v4), .visionOS(.v1)
                                            ^

Changes proposed in this PR

Tests performed

Further info for the reviewer

Open Issues

[weichsel]

Thanks for the changes!

[swiftyfinch]

Hello @weichsel! Are you going to release a patch with this changes?