OpenApi 3.1 Schema Object $id resolution bug

[char0n]

When resolving chain of $id fields, we first need to provide a baseURI before the resolution happens. This is mandated by new URL Standard: https://url.spec.whatwg.org/

Before this, we used deprecated node url.resolve which could compensate, but that's not the case any more as we're using new WHATWG URL standard.

Ref: #425