EPSS CSV retrieval is being strained by a go client

[jayjacobs]

I am not sure if your package is causing this or not, but the API serving up the CSV for EPSS is being hit repeatedly by a client with the user agent of "Go-http-client/2.0" with some IP addresses requesting the CSV thousands of times per day. Could you implement some type of local caching that will only retrieve the CSV once per day?

The URL "https://epss.cyentia.com/epss_scores-current.csv.gz" should always return a 302 redirect to a URL that contains a date in the filename. If you could check that against a local cache and not retrieve the full CSV repeatedly that would help our API costs and hopefully prevent us from having to implement a rate limit or registration.