feat: make net.automatalib.incremental.mealy.tree.Node public

Author: tiferrei

incremental/src/main/java/net/automatalib/incremental/mealy/tree/Node.java

@@ -18,7 +18,7 @@
 import net.automatalib.commons.smartcollections.ResizingArrayStorage;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
-final class Node<O> {
+public final class Node<O> {
 
     private final ResizingArrayStorage<Edge<Node<O>, O>> outEdges;