Build and test with Java 24

Build and test with Java 24

Update Gradle: 8.12 → 8.13

Update Gradle: 8.12 → 8.13

Switch to JUnit 5

Cleanup SshProxyTest

Update Gradle: 8.9 → 8.10.1

Update Gradle: 8.8 → 8.9

Build and test with Java 21 and 22 instead of 20

Update Gradle: 8.2 → 8.8

Update all Gradle dependencies

Archive Gradle test reports when the build fails

Run and test with Java 20 (instead of 18_

Raise minimum JDK version to 11

Update Gradle: 7.4.1 → 8.2