Fail immediately if any command fails
Fail immediately if any command fails

I was having issues where the `swift build` command was failing but the script itself wouldn't fail. Using `set -x` will cause the shell script to immediately stop and exit if any command in the script itself fails.
SwiftKit/Cuckoo,Brightify/Cuckoo,Brightify/Cuckoo,SwiftKit/Cuckoo,Brightify/Cuckoo,SwiftKit/Cuckoo