Fix Package.swift

I'm trying to add a Package.swift to the project at https://github.com/hankinsoft/SSSnackbar. I've been able to add the package to Xcode, but when I try to 'Import SSSnackbar' I get the error "AppDelegate.swift:9:8: No such module 'SSSnackbar'"

I need somebody to fix the Package.swift.

Screenshot of the error attached.