rank_filter.recipe/meta.yaml: Handle an issue with `np` becoming `None`.
rank_filter.recipe/meta.yaml: Handle an issue with `np` becoming `None`.

jakirkham/rank_filter,nanshe-org/rank_filter,jakirkham/rank_filter,DudLab/rank_filter,nanshe-org/rank_filter,nanshe-org/rank_filter,DudLab/rank_filter,DudLab/rank_filter,jakirkham/rank_filter