SyntaxError: Unexpected token ...
**Hi.I'm get the following error:**
   SyntaxError: Unexpected token ...

 **this is my code:**
_static async sandbox(config, debug) {
        let {
            sandbox_signkey
        } = await Payment.init(config).getSignkey();
        return new Payment({
            ...config,
            partnerKey: sandbox_signkey,
            sandbox: true
        }, debug);
    }_


Koa2 supports es2017, so I didn't configure Babel in my project.
my node is v8.2.1~
Does the koa2 need Babel?
