Accept json or string encoding of result

action.yml

@@ -19,6 +19,9 @@ inputs:
     default: actions/github-script
   previews:
     description: A comma-separated list of API previews to accept
+  result-encoding:
+    description: Either "string" or "json" (default "json")—how the result will be encoded 
+    default: json
 outputs:
   result:
     description: The return value of the script, stringified with `JSON.stringify`