Expand jsonschema requirements to <4

ethpm/validation/manifest.py

@@ -10,6 +10,10 @@
     ValidationError as jsonValidationError,
     validate,
 )
+from jsonschema.validators import (
+    Draft4Validator,
+    validator_for,
+)
 
 from ethpm import (
     ASSETS_DIR,
@@ -75,7 +79,7 @@ def validate_manifest_against_schema(manifest: Dict[str, Any]) -> None:
     """
     schema_data = _load_schema_data()
     try:
-        validate(manifest, schema_data)
+        validate(manifest, schema_data, cls=validator_for(schema_data, Draft4Validator))
     except jsonValidationError as e:
         raise EthPMValidationError(
             f"Manifest invalid for schema version {schema_data['version']}. "

newsfragments/1446.misc.rst

@@ -0,0 +1 @@
+Update jsonschema to use version 3 instead of 2.

setup.py

@@ -73,7 +73,7 @@
         "eth-utils>=1.4.0,<2.0.0",
         "hexbytes>=0.1.0,<1.0.0",
         "ipfshttpclient>=0.4.12,<1",
-        "jsonschema>=2.6.0,<3",
+        "jsonschema>=3.0.0,<4.0.0",
         "lru-dict>=1.1.6,<2.0.0",
         "protobuf>=3.0.0,<4",
         "pypiwin32>=223;platform_system=='Windows'",