[BUG] typescript-node generates invalid code for 'api-key'

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• [x<] What's the version of OpenAPI Generator used? 4.1.1
• Have you search for related issues/PRs?
• What's the actual output vs expected output?

Description

1. Download the following file https://directory-te.preta.eu/directory/static/directory/api/tppSwaggerApi.json
2. Run openapi-generator generate -i tppSwaggerApi.json -g typescript-node

Result: An invalid enum is generated.

// ===============================================
// This file is autogenerated - Please do not edit
// ===============================================

export enum TppApiApiKeys {
    api-key,
}

Also, for some reason the response type is using response: http.ClientResponse which does not seem to work. When changed to response: localVarRequest.Response everything works as expected.

Start by running openapi-generator generate -i tppSwaggerApi.json -g typescript-node with the linked specification and inspect the generated TppApiApiKeys enum and response type. Trace the typescript-node generation path for these outputs; done means the generated enum is valid TypeScript and the response type works without manual changes.