Non-root user support for oclif pack deb

[riywo]

Do you want to request a feature or report a bug?

Mixture.

What is the current behavior?

If the current behavior is a bug, please provide the steps to reproduce.

With non-root user:

$ npx oclif pack deb
...
    Error: Command failed: /bin/sh -c chown -R root "/workspaces/mycli/tmp/apt/mycli_0.1.0.d5f2854-1_amd64.apt"
    Code: 1

What is the expected behavior?

Please mention your oclif and OS version.

Here is the problematic code:

oclif/src/commands/pack/deb.ts

Lines 78 to 79 in e9d89f5

	await qq.x(`chown -R root "${workspace}"`)
	await qq.x(`chgrp -R root "${workspace}"`)

These days we don't need to use the real root user when packaging deb:

https://askubuntu.com/questions/735883/what-user-file-owner-to-use-when-creating-debian-packages

[mdonnalley]

Fixed by #987