Allow requestContext.authorizer be None
Allow requestContext.authorizer be None

On Scaleway at least, authorizer is often None:

    "requestContext": {
      "accountId": "",
      "resourceId": "",
      "stage": "",
      "requestId": "",
      "resourcePath": "",
      "authorizer": None,
      "httpMethod": "GET",
      "apiId": ""
    },

logandk/serverless-wsgi,logandk/serverless-wsgi