- Replace osm.rs with foursquare.rs using Foursquare Places Search API
- Add isocountry crate for ISO 3166-1 country code to name conversion
- Override verbose country names (e.g. "United Kingdom" instead of
"United Kingdom of Great Britain and Northern Ireland")
- Add BREWLOG_FOURSQUARE_API_KEY env var for API authentication
- Update route handler, tests, and template to use Foursquare
- Modernise cafes template JS to ES6+ (const/let, arrow fns, template
literals)