firebase-tools: Firebase deploy hosting not running predeploy scripts

I upgrade to firebase-tools 6.3.0 and when I deploy to hosting, it is not running my predeploy scripts. In specific I am running sass and webpack. I downgraded to 6.2.0 and everything works fine.

Environment info

firebase-tools: 6.3.0

Platform: macOS

Test case

Steps to reproduce

Run firebase deploy --only hosting

Expected behavior

“predeploy” scripts should run.

Actual behavior

“predeploy” scripts are not running.