After upgrading to Gradle 5.4.1 and Android Stuidio 3.5 RC 3, crashlyticsUploadDeobsRelease task is gone

I've figured it out: downgrade gradle plugin to 3.4.2

No one bothered to mention in release notes that 3.5 version comes with this surprise, but the pop-up to update gradle plugin works flawlessly.

Hope this will help others.