github.com/kaptinlin/jsonschema@v0.4.6/testdata/JSON-Schema-Test-Suite/tests/draft-next/optional (about) anchor.json bignum.json dependencies-compatibility.json dynamicRef.json ecmascript-regex.json float-overflow.json format-assertion.json format id.json non-bmp-regex.json refOfUnknownKeyword.json unknownKeyword.json