Rakefile in deka_eiwakun-0.4.0 vs Rakefile in deka_eiwakun-0.5.0

@@ -1,4 +1,6 @@
+# frozen_string_literal: true
+
 require 'bundler/gem_tasks'
 require 'rubocop/rake_task'
 
 task default: :rubocop