Gemfile in statsd-instrument-3.9.3 vs Gemfile in statsd-instrument-3.9.4

@@ -10,9 +10,11 @@
 gem "yard"
 gem "rubocop", ">= 1.0"
 gem "rubocop-shopify", require: false
 gem "benchmark-ips"
 gem "dogstatsd-ruby", "~> 5.0", require: false
+gem "simplecov", require: false, group: :test
+
 platform :mri do
   # only if Ruby is MRI && >= 3.2
   if Gem::Version.new(RUBY_VERSION) >= Gem::Version.new("3.2")
     gem "vernier", require: false
   end