Bump hibernate.version from 5.4.18.Final to 5.4.20.Final#17

dependabot-preview[bot] wants to merge 1 commit intomastersvis/topjava:masterfrom

dependabot/maven/hibernate.version-5.4.20.Finalsvis/topjava:dependabot/maven/hibernate.version-5.4.20.FinalCopy head branch name to clipboard