Update taxonomy fields and/or its tags. Only provided fields are changed.

If tags is provided it replaces the entire tag set: entries are matched by key, then by value, and updated; unmatched entries are created; existing tags not listed are deleted. The "other" tag is never removed. Omit tags to leave tags unchanged.

Pass null for parent_key, base_taxonomy_key or classifier_key to remove them. Setting a public base_taxonomy_key copies its tags (values already present are skipped).