Lint rules

lib/good_job/scheduler.rb:140:76: C: Style/SymbolProc: Pass &:next as an argument to new instead of a block.
      future = Concurrent::Future.new(args: [@Performer], executor: @pool) do |performer| ...
                                                                           ^^^^^^^^^^^^^^

Although I'm not sure I find this cleaner.

lib/good_job/scheduler.rb

@@ -137,9 +137,7 @@ def create_thread(state = nil)
         return false unless @performer.next?(state)
       end
 
-      future = Concurrent::Future.new(args: [@performer], executor: @pool) do |performer|
-        performer.next
-      end
+      future = Concurrent::Future.new(args: [@performer], executor: @pool, &:next)
       future.add_observer(self, :task_observer)
       future.execute