post https://api.short.io/links/bulk
Please use this method if you need to create big packs of links. It
accepts up to 1000 links in one API call.
It works almost the same as single link creation endpoint, but accepts
an array of URLs and returns an array of responses.
Returns list of Link objects. If any URL is failed to insert, it returns
error object instead as array element. Method is not transactional – it
can insert some links from the list and return an error for others.
Rate limit: 5 queries in 10 seconds