Serialize recurring task's arguments using a custom coder

That uses Active Job's arguments serializer/deserializer.

app/models/solid_queue/recurring_task.rb

@@ -2,15 +2,15 @@
 
 module SolidQueue
   class RecurringTask < Record
-    serialize :arguments, coder: JSON
+    serialize :arguments, coder: Arguments, default: []
 
     class << self
       def wrap(args)
         args.is_a?(self) ? args : from_configuration(args.first, **args.second)
       end
 
       def from_configuration(key, **options)
-        new(key: key, class_name: options[:class], schedule: options[:schedule], arguments: options[:args] || [])
+        new(key: key, class_name: options[:class], schedule: options[:schedule], arguments: options[:args])
       end
     end
 

app/models/solid_queue/recurring_task/arguments.rb

@@ -0,0 +1,13 @@
+module SolidQueue
+  class RecurringTask::Arguments
+    class << self
+      def load(data)
+        data.nil? ? [] : ActiveJob::Arguments.deserialize(ActiveSupport::JSON.load(data))
+      end
+
+      def dump(data)
+        ActiveSupport::JSON.dump(ActiveJob::Arguments.serialize(data)) unless data.nil?
+      end
+    end
+  end
+end