OAS 3.1: description in Server Variable Object rejected as unevaluated property #293

SwaggerParser.validate() rejects valid OpenAPI 3.1 documents where a Server Variable Object has a description, which is allowed by the spec (https://spec.openapis.org/oas/v3.1.0#server-variable-object). Reproduced with 12.1.0 and 13.1.0.

openapi: 3.1.0
info: { title: t, version: '1' }
paths: {}
servers:
  - url: https://{host}/v1
    variables:
      host:
        default: example.com
        description: Host name

Swagger schema validation failed.
  #/servers/0/variables/host must NOT have unevaluated properties

@apidevtools/openapi-schemas@2.1.0 bundles the OAS 3.1 schema from 2021-04-15, where the property is misspelled as descriptions. It was fixed upstream in OAI/OpenAPI-Specification@a8bd1a5, but never released in openapi-schemas (see APIDevTools/openapi-schemas#4).