Update Gemfile

kenyonj · web-flow · commit 890a1fce53a7 · 2019-05-06T11:25:41.000-04:00
diff --git a/Gemfile b/Gemfile
@@ -5,5 +5,6 @@ group :test do
   gem "minitest"
   gem "rake"
   gem "rubocop"
+  gem "rubocop-performance"
   gem "safe_yaml"
 end
