Merge pull request #203 from python-openapi/fix/jsonschema-4.17-dependency-limit

jsonschema 4.17 dependency limit

Author: p1c2u

poetry.lock

@@ -47,7 +47,7 @@ include = [
 ]
 
 [tool.poetry.dependencies]
-jsonschema = "^4.0.0"
+jsonschema = ">=4.0.0,<4.18.0"
 openapi-schema-validator = "^0.4.2"
 python = "^3.7.0"
 requests = {version = "*", optional = true}