Update jsonschema.protocols.Validator.__init__

[sirosen]

The signature of this protocol has changed in recent versions of jsonschema. Update to match.

---

Aside: There was a period (~1 year ago?) when I was actively working on jsonschema types with a plan to backport things from typeshed to jsonschema.
I got a bit bogged down and the work is unfinished, but I would ultimately like to help make that happen. In the meantime, I still want to keep these in sync. :)

[github-actions]

Diff from mypy_primer, showing the effect of this PR on open source code:

check-jsonschema (https://github.com/python-jsonschema/check-jsonschema)
- src/check_jsonschema/schema_loader/main.py:190: error: Unexpected keyword argument "registry" for "Validator"  [call-arg]
+ src/check_jsonschema/schema_loader/main.py:219: error: Missing positional argument "registry" in call to "Validator"  [call-arg]
+ src/check_jsonschema/schema_loader/main.py:277: error: Missing positional argument "registry" in call to "Validator"  [call-arg]

schemathesis (https://github.com/schemathesis/schemathesis)
+ src/schemathesis/specs/openapi/definitions.py: note: In function "make_validator":
+ src/schemathesis/specs/openapi/definitions.py:1918: error: Missing positional argument "registry" in call to "Validator"  [call-arg]
+ src/schemathesis/specs/openapi/negative/__init__.py: note: In function "get_validator":
+ src/schemathesis/specs/openapi/negative/__init__.py:43: error: Missing positional argument "registry" in call to "Validator"  [call-arg]
+ src/schemathesis/specs/openapi/negative/__init__.py: note: At top level:

[sirosen]

☝️ Quick note on the above mypy_primer results:
The signature of the protocol does not allow for deprecated args (notably, resolver), even though these currently are allowed at runtime. And the arg is declared as keyword-or-positional but I'm not sure if the order of arguments matches what would happen at runtime with positional args.

This is just what we get with a verbatim copy of the __init__ signature of this protocol from the source repo. I think that it's best to mirror values as closely as possible.

[srittau]

Thanks!