bin/console in key_tree-0.5.3 vs bin/console in key_tree-0.6.0

@@ -1,5 +1,6 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
 
 require 'bundler/setup'
 require 'key_tree'
 
 # You can add fixtures and/or initialization code here to make experimenting