update-manifest.json

{
    "addons": {
        "ku-rmp@jamesmendel": {
            "updates": [
                {
                    "version": "1.0",
                    "update_link": "https://github.com/jamesmendel/ku-rmp/releases/download/1.0/ku_search_ratemyprofessors-1.0-an+fx.xpi"
                },
                {
                    "version": "1.1",
                    "update_link": "https://github.com/jamesmendel/ku-rmp/releases/download/v1.1/ku_search_ratemyprofessors-1.1-fx.xpi"
                },
                {
                    "version": "1.1.1",
                    "update_link": "https://github.com/jamesmendel/ku-rmp/releases/download/v1.1.1/ku_search_ratemyprofessors-1.1.1-fx.xpi"
                },
                {
                    "version": "1.2",
                    "update_link": "https://github.com/jamesmendel/ku-rmp/releases/download/v1.2/ku_search_ratemyprofessors-1.2-fx.xpi"
                }
            ]
        }
    }
}