Move stringify_keys to client_push

lib/sidekiq/extensions/generic_proxy.rb

@@ -4,7 +4,7 @@ module Sidekiq
       def initialize(performable, target, options={})
         @performable = performable
         @target = target
-        @opts = performable.stringify_keys(options)
+        @opts = options
       end
 
       def method_missing(name, *args)

lib/sidekiq/worker.rb

@@ -68,8 +68,8 @@ module Sidekiq
         hash
       end
 
-      def client_push(*args) # :nodoc:
+      def client_push(item) # :nodoc:
-        Sidekiq::Client.push(*args)
+        Sidekiq::Client.push(stringify_keys(item))
       end
 
     end