JsonSchema 'true' produces literal 'true' type instead of unknown

[m-ronchi]

Description

boolean true/false are valid JsonSchemas and represents respectively "everything is valid" / "nothing is valid".

when openapi-typescript encounters one (e.g. {"properties": {"foo": true}} it produces foo: true instead of foo: unknown in the corresponding type

Name	Version
openapi-typescript	6.3.4
Node.js	v18.15.0
OS + version	macOS

Reproduction

minimal-api.json:

{
  "openapi": "3.1.0",
  "servers": [ { "url": "" } ],
  "info": {
    "title": "API",
    "version": ""
  },
  "paths": { },
  "components": {
    "schemas": {
      "Foo": {
        "type": "object",
        "properties": {
          "works": { },
          "fails": true
        }
      }
    }
  }
}

$ npx openapi-typescript minimal-api.json:

/**
 * This file was auto-generated by openapi-typescript.
 * Do not make direct changes to the file.
 */


export type paths = Record<string, never>;

export type webhooks = Record<string, never>;

export interface components {
  schemas: {
    Foo: {
      works?: unknown;
      fails?: true;
    };
  };
  responses: never;
  parameters: never;
  requestBodies: never;
  headers: never;
  pathItems: never;
}

export type external = Record<string, never>;

export type operations = Record<string, never>;

Expected result

....
    Foo: {
      works?: unknown;
      fails?: unknown; <-- here
    };
....

also false should either produce : never or omit the property

Checklist

• My OpenAPI schema passes the Redocly validator (npx @redocly/cli@latest lint)
• I’m willing to open a PR (see CONTRIBUTING.md)

NOTE: redocly fails expecting an object in that position, but both the JsonSchema spec and other validators online (like this) say it's valid