fix: add missing public Getter (#1632)

Add public Getter for `updateSets`
Fixes #1630

Author: manticore-projects

src/main/java/net/sf/jsqlparser/statement/insert/InsertConflictAction.java

@@ -32,15 +32,17 @@
  */
 
 public class InsertConflictAction {
-    ConflictActionType conflictActionType;
-
     private final ArrayList<UpdateSet> updateSets = new ArrayList<>();
+    ConflictActionType conflictActionType;
     Expression whereExpression;
-
     public InsertConflictAction(ConflictActionType conflictActionType) {
         this.conflictActionType = Objects.requireNonNull(conflictActionType, "The Conflict Action Type is mandatory and must not be Null.");
     }
 
+    public ArrayList<UpdateSet> getUpdateSets() {
+        return updateSets;
+    }
+
     public ConflictActionType getConflictActionType() {
         return conflictActionType;
     }