Rakefile in chunky_png-1.3.12 vs Rakefile in chunky_png-1.3.13

@@ -1,4 +1,6 @@
+# frozen-string-literal: true
+
 require "bundler/gem_tasks"
 require "rspec/core/rake_task"
 
 Dir["tasks/*.rake"].each { |file| load(file) }