Add support for unevaluatedItems and unevaluatedProperties

[jhthorsen]

JSON::Validator::Schema::Draft201909 does not know how to track annotations and because of that unable to validate unevaluatedItems and unevaluatedProperties.

PR can be created seperately for annotations, unevaluatedItems and unevaluatedProperties.

• annotations: https://tools.ietf.org/html/draft-handrews-json-schema-02#section-7.7
• unevaluatedItems: https://tools.ietf.org/html/draft-handrews-json-schema-02#section-9.3.1.3
• unevaluatedProperties: https://tools.ietf.org/html/draft-handrews-json-schema-02#section-9.3.2.4

[jhthorsen]

Closing this in favor of #247.