deepObject paramters with array values do not support nested $refs

[ahx]

This test case should pass, but produces an unexpected error "value at /filter is not an array".
It works as expected if the $ref is inlined.

    openapi: 3.1.1
    paths:
      /:
        get:
          operationId: 'foo'
          parameters:
            - name: filter
              in: query
              style: deepObject
              explode: true
              schema:
                type: object
                properties:
                  ids:
                    $ref: '../data/components/schemas/integers.yaml'
          responses:
            '200':
              description: ok

GET /?filter[ids]=1&filter[ids]=2

[ahx]

Here is a failing test #449