Dadata

- Do not pass the date in `get_daily_stats()` by default.
- List public types in package `__all__`.

- Optional secret key in `SuggestClient`

- Async API client (`DadataAsync`)
- Switched from SemVer to CalVer

- Profile API: `get_balance()`, `get_daily_stats()`, `get_versions()`
- All methods accept additional parameters as kwargs
- BREAKING: required `name` argument in `geolocate()`

- Add requests dependency ([6262c4f](https://github.com/hflabs/dadata-py/commit/6262c4f28258c124167438d6644fc559c8c102a2))

- Basic Dadata API support ([203e8b4](https://github.com/hflabs/dadata-py/commit/203e8b4706249abe359a8d3f4cc877b70c25a3f0))