Gemfile in active_notifier-0.3.0 vs Gemfile in active_notifier-0.4.0

@@ -2,5 +2,15 @@
 
 git_source(:github) { |repo_name| "https://github.com/#{repo_name}" }
 
 # Specify your gem's dependencies in active_notifier.gemspec
 gemspec
+
+gem "bundler", "~> 1.16"
+gem "byebug"
+gem "codecov", ">= 0.1.10", require: false
+gem "rake", "~> 10.0"
+gem "rspec", "~> 3.7", require: false
+gem "rubocop", "~> 0.58.1", require: false
+gem "simplecov", require: false
+gem "vcr", "~> 4.0", require: false
+gem "webmock", "~> 3.4", ">= 3.4.2", require: false