New Features
* Added support, tests, and docs for using ``DirectoryStore``, ``TempStore``, and
``NestedDirectoryStore`` Zarr storage backends with ``ZarrIO`` and ``NWBZarrIO``.
oruebel [62](https://github.com/hdmf-dev/hdmf-zarr/pull/62)
Minor enhancements
* Updated handling of references on read to simplify future integration of file-based Zarr
stores (e.g., ZipStore or database stores). oruebel [62](https://github.com/hdmf-dev/hdmf-zarr/pull/62)
* Added ``can_read`` classmethod to ``ZarrIO``. bendichter [97](https://github.com/hdmf-dev/hdmf-zarr/pull/97)
Test suite enhancements
* Modularized unit tests to simplify running tests for multiple Zarr storage backends.
oruebel [62](https://github.com/hdmf-dev/hdmf-zarr/pull/62)
* Fixed CI testing of minimum and optional installation requirement. rly
[99](https://github.com/hdmf-dev/hdmf-zarr/pull/99)
* Updated tests to handle upcoming changes to ``HDMFIO``. rly
[102](https://github.com/hdmf-dev/hdmf-zarr/pull/102)
Docs
* Added developer documentation on how to integrate new storage backends with ZarrIO. oruebel
[62](https://github.com/hdmf-dev/hdmf-zarr/pull/62)
API Changes
* Removed unused ``filepath`` argument from ``ZarrIO.get_builder_exists_on_disk`` [62](https://github.com/hdmf-dev/hdmf-zarr/pull/62)
Bug fixes
* Fixed error in nightly CI. rly [93](https://github.com/hdmf-dev/hdmf-zarr/pull/93)