Failed to build module 'AdyenPOS'; this SDK is not supported by the compiler (Xcode 16.2)

[DzmitryKudrashou]

Describe the bug
If a developer uses an Xcode version that is different than the Xcode was used to compile AdyenPOS Xcode generates a compile time error. For example. the next error is from Xcode 16.2

Failed to build module this SDK is not supported by the compiler (the SDK is built with 'Apple Swift version 6.0.2 effective-5.10 (swiftlang-6.0.2.1.2 clang-1600.0.26.4)', while this compiler is 'Apple Swift version 6.0.3 effective-5.10 (swiftlang-6.0.3.1.10 clang-1600.0.30.1)'). Please select a toolchain which matches the SDK.

To Reproduce
Steps to reproduce the behavior:

1. Create an empty project with Xcode 16.2 (the latest version)
2. Add a swift package package(url: "https://github.com/Adyen/adyen-pos-mobile-ios-test", branch: "main")
3. Add import AdyenPOS to a swift file, for example it can be AppDelegate.swift
4. Try to compile.
5. See an error

Failed to build module this SDK is not supported by the compiler (the SDK is built with 'Apple Swift version 6.0.2 effective-5.10 (swiftlang-6.0.2.1.2 clang-1600.0.26.4)', while this compiler is 'Apple Swift version 6.0.3 effective-5.10 (swiftlang-6.0.3.1.10 clang-1600.0.30.1)'). Please select a toolchain which matches the SDK.

Expected behavior
By the AdyenPOS manifest, any Xcode version that supports swift-tools-version:5.6 needs to have possibility to compile AdyenPOS without compile time errors. For swift-tools-version:5.6 it needs to be Xcode 15.0 - Xcode 16.2

Screenshots

Desktop (please complete the following information):

• OS: Mac
• Version [15.3]
• Xcode: 16.2

Smartphone (please complete the following information):

• Device: [iPhone 16 pro]
• OS: [iOS18.2]