Support multi-file schemas #715

Hello,
I'm new to OpenAPI and Schemas world so it could be possible that I'm doing something wrong.
I'm trying to add '#ref' to components in openapi.json to link to another file.

for example:
"components": {
"schemas": {
"User": {
"$ref": "./schemas/User"
}
}

And I'm getting the errors:
Remote references such as ././.. are not supported yet.
and Reference schemas are not supported.

Can I link schemas files some other way? I dont want to write all my schemas in the openapi.json file.
Thanks in advance the thank you for this project.