Link styling is not working in the tree module
Problem:
 link[cls-n] not working in the tree module for example: 
 
 "link[soft]": {
     lineWidth: '10px',
     lineColor: 'red'
 }
 
 Solution:
 link[cls-n] actually works. However, you should be aware of a bug where adding generic styles for the link i.e. link:{}, after the custom styles will override all the custom styles. This will be resolved and the fix will be available in a future version of the library. This will not stop link[cls-n] from working. Please use this demo for reference

