Do not set default value for opts.retiries if timeout is present.

[Firnis]

It quite isn't right to retry request 5 times when timeout is present in options.

[SamVerschueren]

Why isn't that correct? A timeout is per individual call.

Let's say I have an endpoint and I set the timeout to 10 seconds. With this PR, this means that my retry count is set to 0 and will stop executing if the first call fails due to a network error. timeout and retries or 2 separate settings, I don't believe there is a link between those two.

[Firnis]

But if your endPoint is not answering, then you will be waiting 5*10 seconds.
I see your point, but you can set count of retries manually if you need.

[sindresorhus]

This is not a solution we're interested in. I do however see that it how it works can be an issue. I don't really have a solution, but happy to discuss in an issue if you have a better proposal :)