Return image urls for series endpoint #443
Description
Currently both the series and series/{id} endpoints dont return image urls.
It would be great if the api returned an image url for series items. The same way the issue endpoints do.
Even if it would just return the cover image of the first issue of that series, that would already be great.
Otherwise if I were to currently implement a series search, I would have to call the series endpoint, get the issue list for each series and then take their first cover. Which would be wasteful, probably slow and also probably not in favor for the rate limiting.
Without this I would not be able to build a proper series search in my app. So it would be a great addition, thank you!