THIS WILL INVALIDATE THE EXISTING CACHE!
The new cache now pulls data from all three of geoip, ip2location, and
ipinfo, and stores it in the relatively simple city;region;country
format.

The old format would either store city;country or store
countrycode;country;region;city directly from ip2location, so it is much
more consistent with this change.

This comes with something of a refactor.

- IP2LOCATION_KEY is now checked with `if not` to reduce indention
- ConnectionError is increased to RequestException to catch all requests
  errors
  - On that note, now raising for status too

This comes with something of a refactor.

- IPINFO_TOKEN is now checked with `if not` to reduce indention
- ConnectionError is increased to RequestException to catch all requests
  errors
  - On that note, now raising for status too
- Now catching ValueError in case of json parsing failure