Hibernate 7.1.0.Final breaks compatibility with hypersistence-utils-hibernate-70

[ylazakovich]

api of hibernate has been changed and started breaking hypersistence-utils-hibernate-70

[vladmihalcea]

If you send me a Pull Request with the fix, I'll review it.

[cigaly]

Just created pull request #805 with changes needed to create hypersistence-utils-hibernate-71. (And some comments as description) Unfortunately, changed return type of method org.hibernate.usertype.UserType#getValueConverter does not allow that both 7.0 and 7.1 be handled with same set of classes.