Gemfile in letter_opener_web-1.4.0 vs Gemfile in letter_opener_web-1.4.1

@@ -4,5 +4,9 @@
 
 # Declare your gem's dependencies in letter_opener_web.gemspec.
 # Bundler will treat runtime dependencies like base dependencies, and
 # development dependencies will be added by default to the :development group.
 gemspec
+
+group :test do
+  gem 'codecov', require: false
+end