Hi, I'm trying to use jruby to access the shopify API.  Have done this successfully in the past, but upgrading to new versions of both and I can't get it to work.  If shopify requires Ruby 2.4, should it work with the latest jruby (ruby 2.5)?  This is the error I'm getting... 
NoMethodError: undefined method `threadsafe_attribute' for #<Class:ShopifyAPI::Base>
       method_missing at org/jruby/RubyBasicObject.java:1708
      singleton class at C:/jruby-9.2.11.0/lib/ruby/gems/shared/gems/shopify_api-9.0.2/lib/shopify_api/resources/base.rb:34
         <class:Base> at C:/jruby-9.2.11.0/lib/ruby/gems/shared/gems/shopify_api-9.0.2/lib/shopify_api/resources/base.rb:33
  <module:ShopifyAPI> at C:/jruby-9.2.11.0/lib/ruby/gems/shared/gems/shopify_api-9.0.2/lib/shopify_api/resources/base.rb:4
               <main> at C:/jruby-9.2.11.0/lib/ruby/gems/shared/gems/shopify_api-9.0.2/lib/shopify_api/resources/base.rb:3
              require at org/jruby/RubyKernel.java:974