Arch Linux pacman should use option --noconfirm

[stardiviner]

RT original post: https://github.com/jwiegley/use-package/issues/587

[jabranham]

You're right that there should probably be some way of passing arguments to the package manager. I'll work on that.

[jabranham]

Setting system-packages-noconfirm to t should bypass user confirmation.

It currently only works on apt and pacman based systems, I have to look up how to do this with other package managers.

[stardiviner]

Thanks.