try out a hackaround for fixing getting the root attachment (#131)

* try out a hackaround for fixing getting the root attachment

seems the attach method changed from rails 5-6 to return true instead of the newly attached attachment?

* re-add the rescue for error messages

Author: JoshAshby

lib/webpage_cache_service/cache.rb

@@ -96,7 +96,7 @@ def get uri:
 
       # Without manually managing the temp file, there isn't an easy way to
       # breakup the following logic but I did my best and fuck you too rubocop
-      attachments = binary_temp_file do |temp_file|
+      binary_temp_file do |temp_file|
         write_body response: response, to: temp_file
 
         content_type = get_content_type(response: response, io: temp_file)
@@ -110,7 +110,7 @@ def get uri:
         )
       end
 
-      attachment = attachments.first
+      attachment = offline_cache.assets.order(:id).first
 
       [ response, attachment ]
     end