Rakefile in active_model_serializers-0.10.8 vs Rakefile in active_model_serializers-0.10.9

@@ -1,4 +1,6 @@
+# frozen_string_literal: true
+
 begin
   require 'bundler/setup'
 rescue LoadError
   puts 'You must `gem install bundler` and `bundle install` to run rake tasks'
 end