updated Gemfile for test

Gemfile

@@ -4,6 +4,8 @@ group :test do
   gem "rspec", "~> 3.0.0.beta1"
   gem "redis-namespace", "~> 1.4.1"
   gem "codeclimate-test-reporter", require: nil
+  gem "bundler"
+  gem "rake"
 end
 
 # Specify your gem's dependencies in weixin_authorize.gemspec