apollo-server-micro not compatible?
I use Nextjs 9 and happy to use apollo graphql run same project. but i problem to use graphql-upload in apollo-server-micro 

I console.log request income
 
```
[ Promise {
    { filename: 'aa5.png',
    mimetype: 'image/png',
    encoding: '7bit',
    createReadStream: [Function: createReadStream] } } ]
```
when I upload in client to server i found error "createReadStream is not a function" :( please help.
