make class final

We haven't designed the class for extension.

primitiveCollections/src/main/java/org/lucares/collections/IntList.java

@@ -13,7 +13,7 @@ import java.util.stream.StreamSupport;
  * This class does not (yet) implements all methods a java.util {@link List}
  * would have.
  */
-public class IntList implements Serializable, Cloneable {
+public final class IntList implements Serializable, Cloneable {
 
 	// TODO support Iterator
 	// TODO add mod counts
@@ -29,7 +29,7 @@ public class IntList implements Serializable, Cloneable {
 	// TODO remove bounds checks that are handled by java, e.g. negative indices
 	// TODO toString
 
-	private static final long serialVersionUID = -6823520157007564746L;
+	private static final long serialVersionUID = 2622570032686034909L;
 
 	private static final int DEFAULT_CAPACITY = 10;