Rakefile in key_tree-0.5.3 vs Rakefile in key_tree-0.6.0

@@ -1,5 +1,7 @@
+# frozen_string_literal: true
+
 require 'bundler/setup'
 require 'bundler/gem_tasks'
 
 desc 'Run RuboCop'
 require 'rubocop/rake_task'
@@ -9,6 +11,6 @@
 
 desc 'Run RSpec'
 require 'rspec/core/rake_task'
 RSpec::Core::RakeTask.new(:spec)
 
-task default: %i[rubocop spec]
+task default: %i[spec rubocop]