[BUG][typescript-axios] Cannot find name 'Response'

Created by: mushketyk

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• What's the version of OpenAPI Generator used?
• Have you search for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Bounty to sponsor the fix

Description

openapi-generator for typescript-axios does not generate a response type for a method with the following definition:

It generates a method like this:

healthz(options?: any): (axios?: AxiosInstance, basePath?: string) => AxiosPromise<Response> {

But the Response type is not defined.

openapi-generator version

@openapitools/openapi-generator-cli@0.0.9-4.0.0-beta3

OpenAPI declaration file content or url

https://gist.github.com/mushketyk/7456792aeb35b2f9118d91b4cd2243d1

Command line used for generation

npx openapi-generator generate -i swagger.json -g typescript-axios

Steps to reproduce

Create a Swagger.json file with the specified endpoint Generate a client using the provided command. In the result output in the api.ts file the Response type is missing

Suggest a fix

Either define the Response type or return AxiosPromise<void>.