create-the-brass-oncerto/kubejs/jsconfig.json

{
    "compilerOptions": {
        "lib": [
            "ES5",
            "ES2015"
        ],
        "rootDirs": [
            "probe/generated",
            "probe/user",
            "server_scripts",
            "startup_scripts",
            "client_scripts"
        ],
        "target": "ES2015"
    }
}