Fix rubocop errors

lib/rabbit_carrots.rb

@@ -1,24 +1,23 @@
 # frozen_string_literal: true
 
-require_relative "rabbit_carrots/version"
+require_relative 'rabbit_carrots/version'
 require 'rabbit_carrots/connection'
 require 'rabbit_carrots/configuration'
 require 'rabbit_carrots/railtie' if defined?(Rails)
 
-
 module RabbitCarrots
   class Error < StandardError; end
+
   module EventHandlers
     module Errors
       class IrrelevantMessage < StandardError
       end
-  
+
       class NackMessage < StandardError
       end
-  
+
       class NackAndRequeueMessage < StandardError
       end
     end
   end
-  
 end

lib/rabbit_carrots/railtie.rb

@@ -10,4 +10,4 @@ module RabbitCarrots
       Dir.glob("#{path}/tasks/**/*.rake").each { |f| load f }
     end
   end
-end
+end

lib/rabbit_carrots/version.rb

@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module RabbitCarrots
-  VERSION = "0.1.15"
+  VERSION = '0.1.15'
 end