Added missing 'unscoped' (broken in commit a47e0d7), which is needed …

…for delayed_jobs with default-scoped ActiveRecord arguments to function correctly (= as they used to in v.4.0.3). The error message in the rescue block is also broken, but this seems to be fixed in another pull request.

lib/delayed/psych_ext.rb

@@ -35,7 +35,7 @@ def visit_Psych_Nodes_Mapping(object) # rubocop:disable CyclomaticComplexity, Me
           result = super
           if defined?(ActiveRecord::Base) && result.is_a?(ActiveRecord::Base)
             begin
-              result.class.find(result[result.class.primary_key])
+              result.class.unscoped.find(result[result.class.primary_key])
             rescue ActiveRecord::RecordNotFound => error # rubocop:disable BlockNesting
               raise Delayed::DeserializationError, "ActiveRecord::RecordNotFound, class: #{klass}, primary key: #{id} (#{error.message})"
             end