Release 0.2

Removed WeakReferences due to problems with eager garbage collection.

Full Changelog: 0.1.3...0.2

0.1.3

Release with Gradle and dependencies upgrade.
Full Changelog: 0.1.2...0.1.3

Java Module System compliant

updated dependencies;
added module-info.java, so the library is JPMS conform;
api change: imports changed from de.olaf_roeder.event.system.SimpleEventSystem to
de.olaf_roeder.eventsystem.api.SimpleEventSystem;

v0.1.1

Changed plugin type to java-library;

Release 0.1

First release, not production ready, used for testing as Gradle Module.