Select2 tags addon should allow tokenSeparators attribute

#418

Author: joker-777

app/inputs/tags_input.rb

@@ -13,6 +13,7 @@ def load_control_attributes
     load_data_attr(:model, value: model_name)
     load_data_attr(:method, value: method)
     load_data_attr(:width, default: "80%")
+    load_data_attr(:token_separators)
 
     if active_record_select?
       load_data_attr(:relation, value: true)

app/javascript/activeadmin_addons/inputs/tags.js

@@ -18,6 +18,7 @@ var initializer = function() {
         multiple: true,
         tags: true,
         data: collection,
+        tokenSeparators: $(el).data('tokenSeparators'),
       };
 
       if (!!isRelation) {