DeprecationWarning and unsupported key

[stephane-archer]

(node:7706) [DEP0040] DeprecationWarning: The `punycode` module is deprecated. Please use a userland alternative instead.
(Use `node --trace-deprecation ...` to show where the warning was created)
(node:7706) Warning: Accessing non-existent property 'padLevels' of module exports inside circular dependency
(node:7706) [DEP0060] DeprecationWarning: The `util._extend` API is deprecated. Please use Object.assign() instead.
warn: API description parser warning in /Users/fractale/MediaEngineServer/openapi.yml:16 (from line 16 column 9 to column 17): 'Request Body Object' contains unsupported key 'req
uired'
warn: API description parser warning in /Users/fractale/MediaEngineServer/openapi.yml:26 (from line 26 column 19 to column 25): 'Schema Object' contains unsupported key 'format'
(2 occurances)
warn: API description parser warning in /Users/fractale/MediaEngineServer/openapi.yml:83 (from line 83 column 24 to column 46): 'Media Type Object' 'example' is not supported for
 media type 'application/octet-stream'