Options to automatically select/deselect ancestors/descendants when node is checked/unchecked.

Thank you, works fine for the latest 2.0.0 version, however there is one discrepancy in your code in entity_reference_tree.js:

+    },
     attach: function(context, settings) {
+      const self = this;
       $("#entity-reference-tree-wrapper", context)
         .once("jstreeBehavior")
         .each(function() {
@@ -21,6 +53,11 @@

the current version 2.x-dev has different rows :

+    },
     attach: function(context, settings) {
+      const self = this;
 const entityJSTree = once('entityReferenceTree', '#entity-reference-tree-wrapper', context);

It is not possible to use update via composer to the latest version. Anyone can fix it please?
#6 patch works fine, however manual imput is needed.

Rerolled