feat: ability to disable a bredcurmb link in between the stack

README.md

@@ -24,7 +24,7 @@
 [Live Demo](https://xng-breadcrumb.netlify.com/dashboard) - A demo app showcasing `xng-breadcrumb` usage in an Angular app. Navigate through different links to see breadcrumbs behavior.
 
 <p align="center">
-  <a href="https://xng-breadcrumb.netlify.com/dashboard" rel="noopener" target="_blank" ><img width="500" style="box-shadow: 0 2px 1px -1px rgba(0,0,0,.2), 0 1px 1px 0 rgba(0,0,0,.14), 0 1px 3px 0 rgba(0,0,0,.12)" src="https://user-images.githubusercontent.com/20707504/68575589-61287880-0492-11ea-9084-80587321c5c4.png" alt="xng-breadcrumb usage"></a></p>
+  <a href="https://xng-breadcrumb.netlify.com/dashboard" rel="noopener" target="_blank" ><img width="500" src="https://user-images.githubusercontent.com/20707504/68575589-61287880-0492-11ea-9084-80587321c5c4.png" alt="xng-breadcrumb usage"></a></p>
 </p>
 
 ## Features