bin/image_optim in image_optim-0.26.3 vs bin/image_optim in image_optim-0.26.4

@@ -1,6 +1,7 @@
 #!/usr/bin/env ruby
 # encoding: UTF-8
+# frozen_string_literal: true
 
 require 'image_optim/runner'
 require 'image_optim/runner/option_parser'
 
 args = ARGV.dup