Refactoring a schma with "$ref" results in false positive breaking change

The bug
When splitting a schema into two schemas where one refers with allOf to the other the diff shows breaking change, even if the end structure is the same.

To Reproduce

Example schema old.yaml:

openapi: "3.0.0"
info:
  title: Sample API
  description: API description in Markdown.
  version: 1.0.0
servers: []
paths:
  /test:
    get:
      summary: Your GET endpoint
      tags: []
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/working'
components:
  schemas:
    working:
      type: object
      properties:
        foo:
          type: string
        bar:
          type: integer

Example schema new.yaml:

openapi: 3.0.0
info:
  title: Sample API
  description: API description in Markdown.
  version: 1.1.0
servers: []
paths:
  /test:
    get:
      summary: Your GET endpoint
      tags: []
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/working'
      operationId: get-test
components:
  schemas:
    working:
      allOf:
        - type: object
          properties:
            foo:
              type: string
        - $ref: '#/components/schemas/bar'
    bar:
      type: object
      properties:
        bar:
          type: integer

Result of docker run -v $(pwd):/tmp openapitools/openapi-diff:latest /tmp/old.yaml /tmp/new.yaml:

==========================================================================
==                            API CHANGE LOG                            ==
==========================================================================
                                Sample API                                
--------------------------------------------------------------------------
--                            What's Changed                            --
--------------------------------------------------------------------------
- GET    /test
  Return Type:
    - Changed 200 OK
      Media types:
        - Changed application/json
          Schema: Broken compatibility
          Changed property type:  (object -> object)
--------------------------------------------------------------------------
--                                Result                                --
--------------------------------------------------------------------------
                 API changes broke backward compatibility                 
--------------------------------------------------------------------------

Expected behavior
The tool is expected to notice a change but not a breaking one since the allOf mapping results in the same schema after resolving.

Tái hiện báo cáo bằng old.yaml và new.yaml được cung cấp với lệnh docker run được ghi trong tài liệu, sau đó lần theo đường dẫn so sánh schema và phân giải $ref/allOf. Được xem là hoàn tất khi các schema tương đương vẫn tạo ra báo cáo thay đổi mà không có kết quả breaking-compatibility; hãy bổ sung coverage cho ví dụ này nếu bố cục test hiện tại có vị trí phù hợp.