Skip datetime, timedelta, and complex with N5Store (#411)
Skip datetime, timedelta, and complex with N5Store (#411)

The N5 spec does not currently list support for datetime, timedelta, and
complex typed data. So customize `test_dtype` for `N5Store` to avoid
these and instead focus on the types `N5Store` does support.
alimanfoo/zarr,zarr-developers/zarr-python