Enabled MarkupHelper for extending, user can extend and create their own markup util

Author: email2vimalraj

src/main/java/com/aventstack/extentreports/markuputils/MarkupHelper.java

@@ -2,8 +2,6 @@
 
 public class MarkupHelper {
 
-    private MarkupHelper() { }
-    
     public static Markup createLabel(String text, ExtentColor color) {
         Label l = new Label();
         l.setText(text);