Property examples are converted to the wrong date format

[mthaak]

Version: 4.0.4

I have a property with this specification in index.yml:

endDate:
  description: End date of the data point (inclusive).
  example: 2022-01-31
  type: string
  format: date

When running swagger-cli bundle openapi/index.yml --type json -o openapi/openapi-spec.json the resulting JSON file contains:

"endDate": {
  "description": "End date of the data point (inclusive).",
  "example": "2022-01-31T00:00:00.000Z",
  "type": "string",
  "format": "date"
},

Note how the example is converted to a full ISO-8601 datetime string.

This is breaking validation in another tool I'm using. Because if format: date, then the example must be an ISO-8601 date like 2023-01-01.