Expand TUF checkup

[RebeccaMahany]

Expands the current checkup to pull additional data.

Example output:

{
    "launcher_versions_in_library":[
        "/var/kolide-k2/k2device-preprod.kolide.com/updates/launcher/1.1.2",
        "/var/kolide-k2/k2device-preprod.kolide.com/updates/launcher/1.1.2-13-g2789a54",
        "/var/kolide-k2/k2device-preprod.kolide.com/updates/launcher/1.1.2-15-gaa6f573"
    ],
    "local_metadata_version":246,
    "osqueryd_versions_in_library":[
        "/var/kolide-k2/k2device-preprod.kolide.com/updates/osqueryd/5.10.1"
    ],
    "remote_metadata_version":246,
    "selected_versions":{
        "launcher":{
            "path":"/Users/rebeccamahany-horton/Repos/launcher/build/darwin.universal/Kolide.app/Contents/MacOS/launcher",
            "version": ""
        },
        "osqueryd":{
            "path":"/var/kolide-k2/k2device-preprod.kolide.com/updates/osqueryd/5.10.1/osquery.app/Contents/MacOS/osqueryd",
            "version": "5.10.1"
        }
    }
}

[zackattack01]

nice 🚀

[directionless]

Small comments. Could merge as-is