Node 6 deprecation warning

Getting this warning in Azure Devops pipeline when using the Create Image Source VM task (version 3,0.17):

`This task uses Node 6 execution handler, which will be deprecated soon. If you are the developer of the task - please consider the migration guideline to Node 10 handler - https://aka.ms/migrateTaskNode10. If you are the user - feel free to reach out to the owners of this task to proceed on migration.`

Alos see this in the task log:
`(node:7024) [DEP0005] DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead.`