{
    "compilerOptions": {
        "module": "commonjs",
        "target": "es6",
        "lib": [
            "es2017",
            "dom"
        ]
    },
    "exclude": [
        "node_modules"
    ]
}

This tsconfig.json lets us use the power of es2017 (es8) while compiling to es2015 (es6), which Node 6.11.0 supports.