Getting Latest Version of Swift
Solution 1:
Latest Swift comes with Xcode 11.5 which should run on Catalina. So go to the app store and download the latest version of Xcode.
Solution 2:
You can use swiftenv to easily manage your Swift verisions. You can get it from here.
Solution 3:
https://swift.org/download/#releases
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Download Xcode 11.5 and the swift toolchain from the above link.
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Install the toolchain which is in the form of .pkg and will install the toolchain in
/Library/Developer/Toolchains. However, if you manually build a toolchain, you can also instal it to~/Library/Developer/Toolchains. -
Open Xcode app menu > "Toolchains" options will appear and select the new toolchain.
For console use, run export TOOLCHAIN=swift. This will remain the same for that complier window. If you need it permanently add that line to your bash/zsh profile file and reopen Terminal.
If you built the toolchain manually, prepend the path to swift executable to the PATH variable.
https://swift.org/getting-started/#installing-swift
https://github.com/apple/swift#building-swift