Rakefile in avro-builder-0.16.1 vs Rakefile in avro-builder-0.16.2

@@ -1,4 +1,6 @@
+# frozen_string_literal: true
+
 require 'bundler/gem_tasks'
 require 'rspec/core/rake_task'
 require 'appraisal/task'
 
 RSpec::Core::RakeTask.new(:default_spec)