onChange is deprecated

[JSONRice]

@maxschwarzmueller I'm getting a firebase deploy error when running the code with the onChange. Seems this is deprecated. I swapped it out for onFinalize but that's not picking up the file changes (e.g. file upload). Please advise.

firebase-cloud-functions-introduction/functions/index.js

Line 18 in 57ecbe5

exports.onFileChange = functions.storage.object().onChange(event => {

[teolag]

It seems onFinalize should do the trick:
https://firebase.google.com/docs/functions/gcp-storage-events