Concise Object Schema
Concise Object Schema (COS) is a human-friendly object schema description language. See features.
expand(cos, validate): JSONSchema
Expand function accepts COS-object as first argument and returns JSONSchema object.
One of the criteria to expand a node is if a node is valid JSONSchema already. As validation
itself is out of the scope of this library, expand
requires JSONSchema meta-schema
validation function conforming toa.cos.Validate type as second argument. To
keep things simple, consider using expand of @toa.io/schemas.