Making compatible with later versions of spree

app/overrides/spree_digital_product_admin.rb

@@ -0,0 +1,8 @@
+  Deface::Override.new(:virtual_path => "spree/admin/shared/_product_tabs",
+                     :name => "spree_digital_product_admin",
+                     :insert_bottom => "[data-hook='admin_product_tabs'], #admin_product_tabs[data-hook]",
+                     :text => "    <li<%== ' class=\"active\"' if current == \"Digital Versions\" %>>
+      <%= link_to t(\"digital_versions\"), admin_product_digitals_path(@product) %>
+    </li>
+",
+                     :disabled => false)

lib/spree_digital.rb

@@ -1,5 +1,4 @@
 require 'spree_core'
-require 'spree_digital_hooks'
 
 module SpreeDigital
   class Engine < Rails::Engine