Include array items in the output of GetAllSchemas

[2ynn]

GetAllSchemas does not return index references nested under items in an array.

For instance, considering this component:

components:
  schemas:
    Array:
      type: array
      items:
        type: skipped
          properties:
            name:
              type: found

the paths associated with the index references returned by GetAllSchemas are :

• $.components.schemas.Array
• $.components.schemas.Array.items.properties.name

While we would expect this one to also be included in the output :

• $.components.schemas.Array.items

As a result it is not straightforward to perform type checking on the type: skipped node.

Quote from dischord:

the issue here is that 'items' is not being picked up by the index, is that it literally does not have a key of 'schema', but rather 'items'. Right now, this is expected behavior, based on the code, which is here: https://github.com/pb33f/libopenapi/blob/main/index/extract_refs.go#L43

[TristanSpeakEasy]

This PR addresses the above issue plus all other places schemas can be found inline

[daveshanley]

Merged!