Fix postman object handling in ApiExplorer#14

sserrata wants to merge 1 commit intomainsserrata/docusaurus-openapi-docs:mainfrom

codex/fix--tojson-is-not-a-function--errorsserrata/docusaurus-openapi-docs:codex/fix--tojson-is-not-a-function--errorCopy head branch name to clipboard