forked from loafle/openapi-generator-original
* changed files from rebuilding project and updating samples * change default value of from_encoding to empty string - from_encoding = NULL is invalid and produces an error, as only strings are allowed, see https://www.rdocumentation.org/packages/base/versions/3.6.2/topics/iconv - defaulting to an empty string fixes this issue * fix map being surrounded by quotes in json * allow httr2 client to deal with empty response body * changed files from rebuilding project and updating samples * added PetMap schema for test of correct map serialization in toJSONString and regenerated samples