Narrow JSON type, ensure that to_dict always returns a dict, and v2 filter / compressor parsing #2179

d-v-b merged 6 commits intozarr-developers:v3zarr-developers/zarr-python:v3from

d-v-b:refactor/to_dict-returns-dictsd-v-b/zarr-python:refactor/to_dict-returns-dictsCopy head branch name to clipboard