Add semver4j to the default shared packages

 patch by Mick Semb Wever; reviewed by Alex Petrov for CASSANDRA-16803
diff --git a/src/main/java/org/apache/cassandra/distributed/shared/InstanceClassLoader.java b/src/main/java/org/apache/cassandra/distributed/shared/InstanceClassLoader.java
index 51cd14a..c71b75f 100644
--- a/src/main/java/org/apache/cassandra/distributed/shared/InstanceClassLoader.java
+++ b/src/main/java/org/apache/cassandra/distributed/shared/InstanceClassLoader.java
@@ -30,6 +30,7 @@
               name ->
               name.startsWith("org.apache.cassandra.distributed.api.")
               || name.startsWith("org.apache.cassandra.distributed.shared.")
+              || name.startsWith("com.vdurmont.semver4j.")
               || name.startsWith("sun.")
               || name.startsWith("oracle.")
               || name.startsWith("com.intellij.")