Artists: Monthly Listeners and Followers

[slapheadted]

Is your feature request related to a problem? Please describe.
Not a problem per se, but I'd like to be able to retrieve monthly listeners and follower counts for artists.

Describe the solution you'd like
Another endpoint like the album playcounts endpoint e.g. /artist/:id/metadata

Describe alternatives you've considered
Manually doing it in the Spotify Desktop app...slow and manual.

Additional context
I've looked into your "Let's try this out" commit @evilarceus and it looks like we'd probably achieve an Artist MetaData solution by using the MercuryRequest class...I saw an artist-related method in there that seems to get meta data. It might be as simple as creating a new endpoint that uses that method under-the-hood.

[entriphy]

I haven't looked through all the Hermes (hm://) requests and URIs yet, but it should be a simple feature to add as you described.

[Stoley]

looking forward to this one in the next release

[entriphy]

I created a new release with the changes. I'm closing this issue since this feature has been added. #2 is still an active issue.