error: the product 'CommandLineKit' requires minimum platform version 10.12 for macos platform
i'm trying to implement CommandLineKit into a test project but cannot get through this error
Package.swift contains
platforms: [ .macOS(.v10_12) ],
my system is 10.15 (19A583)
$ swift --version
Apple Swift version 5.1.3 (swift-5.1.3-RELEASE)
Target: x86_64-apple-darwin19.0.0
am i missing something?