Rakefile in mailboxer-0.10.3 vs Rakefile in mailboxer-0.11.0

@@ -1,6 +1,10 @@
+require 'rubygems'
+require 'bundler/setup'
+
 require "bundler/gem_tasks"
 
+require 'appraisal'
 require 'rspec/core'
 require 'rspec/core/rake_task'
 RSpec::Core::RakeTask.new(:spec)
 task :default => :spec