New features
- Added `to_zarr` and `from_zarr` methods to InferenceData ([1518](https://github.com/arviz-devs/arviz/pull/1518))
- Added confidence interval band to auto-correlation plot ([1535](https://github.com/arviz-devs/arviz/pull/1535))
Maintenance and fixes
- Updated CmdStanPy converter form compatibility with versions >=0.9.68 ([1558](https://github.com/arviz-devs/arviz/pull/1558) and ([1564](https://github.com/arviz-devs/arviz/pull/1564))
- Updated `from_cmdstanpy`, `from_cmdstan`, `from_numpyro` and `from_pymc3` converters to follow schema convention ([1550](https://github.com/arviz-devs/arviz/pull/1550), [1541](https://github.com/arviz-devs/arviz/pull/1541), [1525](https://github.com/arviz-devs/arviz/pull/1525) and [1555](https://github.com/arviz-devs/arviz/pull/1555))
- Fix calculation of mode as point estimate ([1552](https://github.com/arviz-devs/arviz/pull/1552))
- Remove variable name from legend in posterior predictive plot ([1559](https://github.com/arviz-devs/arviz/pull/1559))
- Added significant digits formatter to round rope values ([1569](https://github.com/arviz-devs/arviz/pull/1569))
- Updated `from_cmdstan`. csv reader, dtype problem fixed and dtype kwarg added for manual dtype casting ([1565](https://github.com/arviz-devs/arviz/pull/1565))
Deprecation
- Removed Geweke diagnostic ([1545](https://github.com/arviz-devs/arviz/pull/1545))
- Removed credible_interval and include_circ arguments ([1548](https://github.com/arviz-devs/arviz/pull/1548))
Documentation
- Added an example for converting dataframe to InferenceData ([1556](https://github.com/arviz-devs/arviz/pull/1556))
- Added example for `coords` argument in `plot_posterior` docstring ([1566](https://github.com/arviz-devs/arviz/pull/1566))