File uploading with fastify adapter doesn't work

I’m submitting a…

[ ] Regression 
[x] Bug report
[ ] Feature request
[ ] Documentation issue or request
[ ] Support request => Please do not submit support request here, instead post your question on Stack Overflow.

Current behavior

File-uploading with fastify adapter results in Unsupported Media Type: multipart/form-data; boundary=----WebKitFormBoundarybFtFByqN8yn20quJ error.

I have also tried

const adapter = new FastifyAdapter();
adapter.register(require('fastify-multipart'));
await NestFactory.create(AppModule, adapter);

which results in TypeError: req.pipe is not a function

Expected behavior

Works properly

Minimal reproduction of the problem with instructions

await NestFactory.create(AppModule, new FastifyAdapter());

And what is described in https://docs.nestjs.com/techniques/file-upload

What is the motivation / use case for changing the behavior?

File uploading should work with FaastifyAdapter

Environment

Nest version: 5.0.1

 
For Tooling issues:
- Node version: v10.5.0  
- Platform: Mac 

Others: N/A