Moved all endpoints to v2, and changed more methods.
All methods involving getting yesterday's data and sorted data have been removed and replaced with kwargs in existing methods.
`get_sorted_data()` -> `get_all_countries(sort='mode')`
`yesterday_all()` -> `all(yesterday=True)`
`yesterday_country(country)` -> `get_country_data(country, yesterday=True)`
Supports `yesterday` kwarg only:
- `all(yesterday=True)`
- `get_country_data(country, yesterday=True)`
- `get_single_state(state, yesterday=True)`
- `get_single_continent(continent, yesterday=True)`
Supports both `yesterday` and `sort` kwargs:
- `get_all_countries(yesterday=True, sort='mode')`
- `get_all_states(yesterday=True, sort='mode')`
- `get_all_continents(yesterday=True, sort='mode')`
New methods
- `get_all_continents(yesterday=True, sort='mode')` - Get the stats for all continents. Returns `List[ContinentStatistics]`
- `get_single_continent(continent, yesterday=True)` - Get the stats for a single continent. Returns a single `ContinentStatistics`