swagger2openapi: timestamp events get converted to YAML timestamps

[delthas]

swagger2openapi: timestamp events get converted to YAML timestamps

• The Swagger code example: "2020-06-11T13:55:24Z"
• gets converted to: example: 2020-06-11T13:55:24Z
• whereas it should be example: "2020-06-11T13:55:24Z"

Checklist

• Conversion: I have checked my source definition is valid OpenAPI 2.0
• Conversion: On valid OpenAPI 2.0 input, the conversion looks wrong

Detailed Description

swagger: "2.0"
info:
  title: foo
  version: 0.0.1
paths:
  /events:
    get:
      responses:
        "200":
          description: "foo"
          schema:
            $ref: '#/definitions/Foo'
definitions:
  Foo:
    properties:
      foo:
        example: "2020-06-11T13:55:24Z"
        type: string

gets rendered with npx swagger2openapi@7.0.8 swagger.yaml -f -o openapi.yaml as:

openapi: 3.0.0
info:
  title: foo
  version: 0.0.1
paths:
  /events:
    get:
      responses:
        "200":
          description: foo
          content:
            "*/*":
              schema:
                $ref: "#/components/schemas/Foo"
components:
  schemas:
    Foo:
      properties:
        foo:
          example: 2020-06-11T13:55:24Z
          type: string

The example value is a YAML timestamp object, not a string. Editors will then fail to parse this example correctly. The Swagger Editor for example, shows OrderedMap for the example value, instead of the string.

Expected behaviour: escape string values so that they stay strings.

Other stuff

swagger2openapi@7.0.8