Until numpy version 1.20.0, numpy.unicode was an alias for str in python3. In 1.20.0, it's fully deprecated and is an int. This is bad and breaks things. This commit drops the np.unicode alias and just uses str, as is advised here:
https://numpy.org/devdocs/release/1.20.0-notes.html#deprecations
Add the `cellxgene schema apply` and `cellxgene schema validate` subcommands.
The first takes an h5ad file and a yaml with config information and produces a new h5ad that follows the cellxgene data integration schema.
The second takes an h5ad and checks if it follows the schema version written into its metadata.
Both are currently marked as "experimental" as the primary intended users are still at CZI.
Marcus Kinsella