Add test for sibling $ref and $id in nested schema to 2019-09 and 2020-12 suites#790

jdesrosiers merged 3 commits intojson-schema-org:mainjson-schema-org/JSON-Schema-Test-Suite:mainfrom

dylankerr-bis:add-test-sibling-nested-ref-iddylankerr-bis/JSON-Schema-Test-Suite:add-test-sibling-nested-ref-idCopy head branch name to clipboard