Update dependency com.networknt:json-schema-validator to v1.0.52

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
com.networknt:json-schema-validator	1.0.51 -> 1.0.52

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Release Notes

networknt/json-schema-validator

### [`v1.0.52`](https://togithub.com/networknt/json-schema-validator/blob/master/CHANGELOG.md#​1052---2021-04-13) [Compare Source](https://togithub.com/networknt/json-schema-validator/compare/1.0.51...1.0.52) ##### Added ##### Changed - fixes [#​398](https://togithub.com/networknt/json-schema-validator/issues/398) Two issues with OpenAPI 3 discriminators. Thanks [@​FWiesner](https://togithub.com/FWiesner) - fixes [#​396](https://togithub.com/networknt/json-schema-validator/issues/396) Implement propertyNames in terms full schema validation. Thanks [@​JonasProgrammer](https://togithub.com/JonasProgrammer)

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