Replace the internal event bus with Event Bus 0.0.3

The Event class has been retrofitted to implement IEvent, so that no
event implementations had to be changed.

server/src/main/java/module-info.java

@@ -16,5 +16,4 @@ module envoy.server {
 	requires transitive java.persistence;
 	requires transitive java.sql;
 	requires transitive org.hibernate.orm.core;
-
 }