Updated to fix recent changes on Riot's end. Also minor code cleanup.

Updated URLs to new versions and did a bit of code cleanup. Namely, the endpoint is now region dependent on Riot's end, so the code reflects that now. See: https://developer.riotgames.com/discussion/riot-games-api/show/IH27EK1I

**Bug**:
There is a somewhat small inconsistency on Riot's part that I'm sure would make the code bug out.

On calling `lol-static-data-v1.2`: If you call it on `na`, the correct URL is:
`https://na.api.pvp.net/api/lol/static-data/na/v1.2/champion?api_key=blah`

However, if you want to call it on `kr`, the correct URL, according to Riot, is:
`https://prod.api.pvp.net/api/lol/static-data/kr/v1.2/champion?api_key=blah`

(notice how it's not `kr.prod.api`)

According to [this link](https://developer.riotgames.com/docs/regional-endpoints), `static-data` SHOULD use the `na.api.pvp.net` endpoint no matter the region. It would be a very easy fix in the code (though I hate Riot for doing it this way; just seems lazy).