Rakefile in simple_cacheable-1.4.1 vs Rakefile in simple_cacheable-1.5.0

@@ -1,6 +1,8 @@
 #!/usr/bin/env rake
+
 require "bundler/gem_tasks"
+require 'appraisal'
 
 require 'rspec/core/rake_task'
 
 RSpec::Core::RakeTask.new(:spec)