Load tasks only in test env

Rakefile

@@ -1,4 +1,3 @@
 # frozen_string_literal: true
 
 Dir.glob('lib/tasks/*.rake').each { |r| import r }
-task default: %w(db:migrate rates:load test rubocop)

lib/tasks/rubocop.rake

@@ -1,5 +0,0 @@
-# frozen_string_literal: true
-
-require 'rubocop/rake_task'
-
-RuboCop::RakeTask.new

lib/tasks/test.rake

@@ -1,9 +1,16 @@
 # frozen_string_literal: true
 
+return unless ENV['RACK_ENV'] == 'test'
+
 require 'rake/testtask'
+require 'rubocop/rake_task'
 
 Rake::TestTask.new(test: :environment) do |t|
   t.libs.push('lib')
   t.test_files = FileList['spec/*_spec.rb']
   t.ruby_opts += ['-W0']
 end
+
+RuboCop::RakeTask.new
+
+task default: %w(db:migrate rates:load test rubocop)