refactored yaml workflow file

nipype-auto-conv/specs/workflows/niworkflows.anat.skullstrip.afni_wf.yaml

@@ -5,11 +5,9 @@ nipype_name: afni_wf
 # name of the nipype module the function is found within, e.g. mriqc.workflows.anatomical.base
 nipype_module: niworkflows.anat.skullstrip
 # Name of the node that is to be considered the input of the workflow, i.e. its outputs will be the inputs of the workflow
-input_nodes:
-  inputnode:
+input_node: inputnode
 # Name of the node that is to be considered the output of the workflow, i.e. its inputs will be the outputs of the workflow
-output_nodes:
-  outputnode:
+output_node: outputnode
 # Generic regular expression substitutions to be run over the code before it is processed
 find_replace: null
 # name of the workflow variable that is returned