{
    "compilerOptions": {
        "outDir": "./built",
        "allowJs": true,
        "target": "es5"
    },
    "include": [
        "./src/**/*"
    ],
    "types": [
        "node"
    ]
}

{
    "compilerOptions": {
        "outDir": "./built",
        "allowJs": true,
        "target": "es6"
    },
    "include": [
        "./src/**/*"
    ],
    "types": [
        "node"
    ]
}

Change typescript target to ES6
Change typescript target to ES6
