text: Title: [FEATURE] Support `jsonschema` 4.18.0+
  Body: **Is your feature request related to a problem? Please describe.**
  
  As of v4.18.0, `jsonschema` emits the following warnings:
  
  ```
  DeprecationWarning: jsonschema.exceptions.RefResolutionError is deprecated as of version 4.18.0. If you wish to catch potential reference resolution errors, directly catch referencing.exceptions.Unresolvable.
  DeprecationWarning: jsonschema.RefResolver is deprecated as of v4.18.0, in favor of the https://github.com/python-jsonschema/referencing library, which provides more compliant referencing behavior as well as more flexible APIs for customization. A future release will remove RefResolver. Please file a feature request (on referencing) if you are missing an API for the kind of customization you need.
  ```
  
  **Describe the solution you'd like**
  
  It would be good if this package could address these warning before these deprecations turn into removals.
  
  **Describe alternatives you've considered**
  
  `jsonschema` could be pinned to older versions, but we would need to support 4.18.x at some point.
  
  **Additional context**
  
  I have raised a similar issue in `hypothesis-jsonschema`: python-jsonschema/hypothesis-jsonschema#102
  