Bump hibernate-core from 3.6.10.Final to 5.3.20.Final in /hibernate

Bumps [hibernate-core](https://github.com/hibernate/hibernate-orm) from 3.6.10.Final to 5.3.20.Final.
- [Release notes](https://github.com/hibernate/hibernate-orm/releases)
- [Changelog](https://github.com/hibernate/hibernate-orm/blob/5.3.20/changelog.txt)
- [Commits](https://github.com/hibernate/hibernate-orm/compare/3.6.10.Final...5.3.20)

---
updated-dependencies:
- dependency-name: org.hibernate:hibernate-core
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/hibernate/pom.xml b/hibernate/pom.xml
index c08237f..b3177be 100644
--- a/hibernate/pom.xml
+++ b/hibernate/pom.xml
@@ -66,7 +66,7 @@
         <dependency>

             <groupId>org.hibernate</groupId>

             <artifactId>hibernate-core</artifactId>

-            <version>3.6.10.Final</version>

+            <version>5.3.20.Final</version>

         </dependency>

         <!-- security issue with collections 3.1: CVE-2015-6420, CVE-2017-15708 -->

         <dependency>