InvalidDefinition error when creating a step-functions state machine with a "Map" state in the docker image amazon/aws-stepfunctions-local for local testing

Hi everyone,

I am running the amazon/aws-stepfunctions-local docker image locally and creating a state-machine which contains a Map state. But the creation fails with the following error message:

An error occurred (InvalidDefinition) when calling the CreateStateMachine operation: Invalid State Machine Definition: ''SCHEMA_VALIDATION_FAILED: These fields are required: [Iterator] at /States/MapState', 'SCHEMA_VALIDATION_FAILED: Field 'ItemProcessor' is not supported at /States/MapState''

Is it possible to create a state-machine with a Map state in the docker-image amazon/aws-stepfunctions-local for local testing?

More dailed description below:

I am doing the following:

docker run -d --name workflow_test -p 8083:8083 \
	--mount type=bind,readonly,source="$PWD/src/test/WorkflowTest_Mock.json",destination=/home/StepFunctionsLocal/MockConfigFile.json \
	-e SFN_MOCK_CONFIG="/home/StepFunctionsLocal/MockConfigFile.json" amazon/aws-stepfunctions-local 


# In another terminal
aws stepfunctions create-state-machine \
    --endpoint http://localhost:8083 \
    --definition "$(cat src/test/test.json)" \
    --name "LambdaSQSIntegration" --role-arn "arn:aws:iam::123456789012:role/service-role/LambdaSQSIntegration"

where src/test/test.json contains the following:

{
  "Comment":"Test",
  "StartAt":"MapState",
  "States":{
	  "MapState": {
		"Type": "Map",
		"ItemProcessor": {
		  "ProcessorConfig": {
			"Mode": "INLINE"
		  },
		  "StartAt": "MyTask",
		  "States": {
			"MyTask": {
			  "Type": "Task",
			  "Resource": "<my-arn>", # substituted
			  "End": true
			}
		  }
		},
		"End": true
	  }
  }
}