My Swift version on my mac:
$ swiftc -version
Apple Swift version 5.3.2 (swiftlang-1200.0.45 clang-1200.0.32.28)
Target: x86_64-apple-darwin19.6.0
However, when I try to change my project's Swift version to 5.3, there's no dropdown option for it:
Xcode version is 12.3
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