OAS 3.1 type: 'null'

[colinmollenhour]

Please add support for the 'null' type in OpenAPI spec 3.1.

E.g.:

oneOf:
  - type: 'null'   # Note the quotes around 'null'
  - type: string

There is a great breakdown of the versions here: https://stackoverflow.com/a/48114322/187780