Unique item properties

Hi! I'm using this lib and it would be of great help in some use cases here for us to have this feature:

https://www.npmjs.com/package/ajv-keywords#uniqueitemproperties

For that, it is needed to add the `ajv-keywords` package inside the validator (you can add the entire package or just some of its features). It is possible to have this feature implemented in this lib? Thanks in advance!