Fixes typo

lib/rabbit_carrots/tasks/rmq.rake

@@ -7,7 +7,7 @@ namespace :rmq do
 
     channels = RabbitCarrots.configuration.routing_key_mappings.map do |mapping|
       # This will be supplied in initializer. At that time, the Handler will not be available to be loaded and will throw Uninitialized Constant
-      { **mapping, handler_class: mapping[:handler_class].constantize }
+      { **mapping, handler: mapping[:handler].constantize }
     end
 
     Rails.logger = Logger.new($stdout)

lib/rabbit_carrots/version.rb

@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module RabbitCarrots
-  VERSION = "0.1.5"
+  VERSION = "0.1.6"
 end