Generating OpenAPI with **typescript-fetch** `npx openapi-generator-cli generate -i ./swagger.json -g typescript-fetch -o ./src/apis`  ##### Description `"openapi": "3.0.0"` <!-- describe what is the question, suggestion or issue and why this is a problem for you. --> ##### openapi-generator version  **openapitools.json**  ##### Steps to reproduce 1. `create-react-app` with TypeScript 2. `npx openapi-generator-cli generate -i ./swagger.json -g typescript-fetch -o ./src/apis` 3. `yarn start` ##### Solution tried But didn't worked 