rspec.rake in knapsack_pro-5.6.0

- old
+ new

@@ -1,4 +1,6 @@
+# frozen_string_literal: true
+
 require 'knapsack_pro'
 
 namespace :knapsack_pro do
   task :rspec, [:rspec_args] do |_, args|
     KnapsackPro::Runners::RSpecRunner.run(args[:rspec_args])