TODO: only send JSON/JSON-LD if it is preferred over *every* other media type, not just html

 - [ ] TODO: this call will currently send JSON/JSON-LD if it is preferred
       Commit: (2c49197) Add default error handler for requested JSON/JSON-LD.
       Fi[lib/express.js:355](https://github.com/digitalbazaar/bedrock-express/blob/master/lib/express.js#L355)
       Dave Longley commented 6 years ago