Describe the bug
Infinite recursion when a reference references itself.

To Reproduce
Steps to reproduce the behavior:
Attempt to dereference the following schema:

{
  "definitions": {
    "node": {
      "type": "object",
      "properties": {
        "name": {
          "type": "string"
        },
        "children": {
          "type": "array",
          "items": {
            "$ref": "#/definitions/node"
          }
        }
      }
    }
  },
  "type": "object",
  "properties": {
    "tree": {
      "title": "Recursive references",
      "$ref": "#/definitions/node"
    }
  }
}

Expected behavior
For the library to detect/handle the self reference and deference appropriately.

Desktop (please complete the following information):

• OS: macos
• Browser: Chrome
• Version: 114

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context
From looking at the code, I think the issue lies around https://github.com/json-schema-tools/dereferencer/blob/master/src/dereferencer.ts#L168

It's creating the sub-dereferencer, passing in the current refCache before the current ref is added. This sub-dereferencer then attempts to dereference the same ref (not finding it in the cache), and so on ad infinitum. Perhaps fetched could be added to refCache before creating subDereffer?