Adding a signal to all fetch requests

[penx]

Description

createClient has an option to pass a signal:

const client = createClient<paths>({
  baseUrl,
  signal: AbortSignal.timeout(18000)
});

However, I think passing AbortSignal.timeout to this creates a timeout from the point of calling createClient rather than at the point of each request.

Proposal

Should the signal option of createClient accept a function that returns a signal, so that it can be recreated for each request?

Extra

• I’m willing to open a PR (see CONTRIBUTING.md)