Fixed ConcurrentModificationException while using queueLookup API method (fixes #481)

Author: Intelli

src/main/java/net/coreprotect/api/QueueLookup.java

@@ -3,6 +3,7 @@
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
+import java.util.ListIterator;
 import java.util.Map;
 
 import org.bukkit.Location;
@@ -49,7 +50,9 @@ public static List<String[]> performLookup(Block block) {
             Map<Integer, Object> consumerObject = Consumer.consumerObjects.get(currentConsumer);
 
             Location oldLocation = block.getLocation();
-            for (Object[] data : consumerData) {
+            ListIterator<Object[]> iterator = consumerData.listIterator();
+            while (iterator.hasNext()) {
+                Object[] data = iterator.next();
                 int id = (int) data[0];
                 int action = (int) data[1];
                 if (action != Process.BLOCK_BREAK && action != Process.BLOCK_PLACE) {