expo-server-sdk 3.8.0 on Node.js NPM

New features

Added useFcmV1 option for explicitly opting in or out from using FCM v1, as opposed to FCM Legacy. Setting useFcmV1 to true will forcibly choose FCM v1 if an FCM v1 JSON credential has been uploaded, setting it to false will forcibly choose FCM Legacy if a legacy FCM token has been uploaded, and leaving it undefined will let the server choose. Read the guide, which explains what that means and goes into more detail about the migration. After the expected date Google will shut down FCM Legacy, June 20th, this option won't do anything since all push notifications will need to use FCM v1.