[typescript-fetch] Add support for file (application/octet-stream) response types
Created by: macjohnny
See https://github.com/swagger-api/swagger-codegen/issues/8409
Solution: adapt PR https://github.com/swagger-api/swagger-codegen/pull/8410
Created by: macjohnny
See https://github.com/swagger-api/swagger-codegen/issues/8409
Solution: adapt PR https://github.com/swagger-api/swagger-codegen/pull/8410