client/index.js not transpiling

I'm seeing an error on IE11 when building the app:

`SCRIPT1010: Expected identifier`

The line causing the error seems to be the first line of the `client/index.js` file, specifically pointing to the object destructing, so I'm assuming it means Babel isn't transpiling this file? Is there something I need to add to my configuration file to resolve this?
https://github.com/Akryum/vue-cli-plugin-ssr/blob/734681cf06846da847ab5009d8ce95dbeef0dba3/client/index.js#L1