Use Spring Framework 5.1 in order to support JDK 11
Use Spring Framework 5.1 in order to support JDK 11

In order to support JDK 11, we need at least Spring Framework 5.1. See:
https://github.com/spring-projects/spring-framework/wiki/Spring-Framework-Versions

christophd/citrus-simulator,christophd/citrus-simulator,christophd/citrus-simulator,christophd/citrus-simulator