Highlights:
- Drop Pandas/Numpy requirement (9)
- Improved iteration support (816a722)
- - Implement tag/key value caching (9a65787)
- Improve dataframe serialization
- Speed improvements (ddc9ecc)
- Memory usage improvements (a2b58bd)
- Disable concatenating of dataframes of the same measurement when grouping by tag (331a0c9)
- Queries now return tag columns with `pd.Categorical` dtype (efdea98)
- Writes now automatically identify `pd.Categorical` dtype columns as tag columns (ddc9ecc)
API changes:
- `mode` attribute was "split" into `mode` and `output`.
Default behavior remains the same (async / raw).
- Iteration is now made easier through the `iterable` mode
and `InfluxDBResult` and `InfluxDBChunkedResult` classes