Update dependencies for JSON schema ref resolving

[m-mohr]

Currently, I get the following warning:

../../../../home/mm/.local/lib/python3.10/site-packages/stac_validator/validate.py:9
../../../../home/mm/.local/lib/python3.10/site-packages/stac_validator/validate.py:9
/home/mm/.local/lib/python3.10/site-packages/stac_validator/validate.py:9: 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.
from jsonschema import RefResolver

[jonhealy1]

I think this can be closed