id,node_id,number,state,locked,title,user,body,created_at,updated_at,closed_at,merged_at,merge_commit_sha,assignee,milestone,draft,head,base,author_association,auto_merge,repo,url,merged_by
339084253,MDExOlB1bGxSZXF1ZXN0MzM5MDg0MjUz,3504,closed,0,Allow appending datetime & boolean variables to zarr stores,463809,"<!-- Feel free to remove check-list items aren't relevant to your change -->

 - [x] Closes #3480
 - [x] Tests added
 - [x] Passes `black . && mypy . && flake8`
 - [x] Fully documented, including `whats-new.rst` for all changes and `api.rst` for new API

AFAICT, the type checking in the `_validate_datatypes_for_zarr_append` is simply too strict, and relaxing it seems to work fine. But this is my first time digging into the xarray source code, so please let me know if this issue is more complex.",2019-11-09T20:09:29Z,2019-11-13T18:47:42Z,2019-11-13T15:55:33Z,2019-11-13T15:55:33Z,40588dc38ddc2d573e3dc8c63b2e6533eb978656,,,0,e766d58045015d12714ceba5c46bfa08d0da595b,ffc32755ca98d11208b6403d424ebcc2ba5bc4fa,CONTRIBUTOR,,13221727,https://github.com/pydata/xarray/pull/3504,