Fix last rubocop entity length rule

.rubocop.yml

@@ -37,4 +37,5 @@ Layout/EndAlignment:
   EnforcedStyleAlignWith: variable
 
 Metrics/BlockLength:
-  Max: 37
+  AllowedMethods:
+  - namespace

Rakefile

@@ -9,7 +9,6 @@ require 'net/http'
 require_relative 'config/config'
 require_relative 'lib/package'
 require_relative 'lib/download'
-require_relative 'lib/dmd_tools'
 
 task :dmd, [:version] do |_, arguments|
   raise 'Version is not specified.' unless arguments.key? :version

rakelib/dmd_tools.rake

@@ -5,7 +5,7 @@
 # frozen_string_literal: true
 
 require 'rake'
-require_relative 'download'
+require_relative '../lib/download'
 
 module SlackBuilder
   module DmdTools