Bump hibernate-core from 5.2.17.Final to 5.3.20.Final in /cloud-data-flow-server#4

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dependabot/maven/cloud-data-flow-server/org.hibernate-hibernate-core-5.3.20.Finallinux-china/spring-boot-microservices:dependabot/maven/cloud-data-flow-server/org.hibernate-hibernate-core-5.3.20.FinalCopy head branch name to clipboard