v1.2.0

Fixed reboots hanging when rebooting Unix VMs.
You must use the provided packer binary.

Usage example:

    {
      "type": "shell",
      "inline": [
        "echo BEFORE REBOOT CODE",
        "echo unix-reboot; sudo reboot; sleep 60"
      ]
    },
    {
      "type": "shell",
      "inline": [ "sleep 60" ]
    },
    {
      "type": "shell",
      "inline": [
        "echo POST REBOOT CODE"
      ]
    }