`unreachableDefinitions` not working with non plain object root node

If root node is not plain object type, unreachableDefinitions doesn't work and unreached definitions is not exported.

Calling: json2ts -i test.schema.json -o test.d.ts --unreachableDefinitions

Package version: 10.1.5 Node version: 17.3.1

Number test

{
  "$schema": "http://json-schema.org/draft-07/schema",
  "type": "number",
  "definitions": {
    "unreached": {
      "type": "boolean"
    }
  }
}

Received

export type TestSchema = number;

Expected

export type TestSchema = number;
export type Unreached = boolean;

Array test

{
  "$schema": "http://json-schema.org/draft-07/schema",
  "type": "array",
  "items": {
    "type": "number"
  },
  "definitions": {
    "unreached": {
      "type": "boolean"
    }
  }
}

Received

export type TestSchema = unknown[];

Expected

export type TestSchema = unknown[];
export type Unreached = boolean;

Logic subschemas test

{
  "$schema": "http://json-schema.org/draft-07/schema",
  "type": "object",
  "oneOf": [
    {
      "type": "number"
    },
    {
      "type": "string"
    }
  ],
  "definitions": {
    "unreached": {
      "type": "boolean"
    }
  }
}

Received

export type TestSchema = number | string;

Expected

export type TestSchema = number | string;
export type Unreached = boolean;

Object (only currently working)

{
  "$schema": "http://json-schema.org/draft-07/schema",
  "type": "object",
  "properties": {
    "test": {
      "type": "number"
    }
  },
  "definitions": {
    "unreached": {
      "type": "boolean"
    }
  }
}

Received and expected

export type Unreached = boolean;

export interface TestSchema {
  test?: number;
  [k: string]: unknown;
}