Fix unit-tests on Windows (#3086)
Fix unit-tests on Windows (#3086)

Due to recent changes in `ios-project-service`, some unit tests cannot work on Windows and Linux, so ignore them in case the OS is not macOS.
NathanaelA/nativescript-cli,NathanaelA/nativescript-cli,NativeScript/nativescript-cli,NativeScript/nativescript-cli,NativeScript/nativescript-cli,NativeScript/nativescript-cli,NathanaelA/nativescript-cli,NathanaelA/nativescript-cli