There's an inconsistent Swift version check for an import.

ArgumentParser version:

main

Swift version:

swift-driver version: 1.62.15 Apple Swift version 5.7.2 (swiftlang-5.7.2.135.5 clang-1400.0.29.51)
Target: x86_64-apple-macosx12.0

Checklist

• If possible, I've reproduced the issue using the main branch of this package
• I've searched for existing GitHub issues

Steps to Reproduce

Search for #if swift(>=.

Expected behavior

All versions the same.

Actual behavior

One version 5.11. All other versions 6.0.