Gemfile in wisper-1.3.0 vs Gemfile in wisper-1.4.0

@@ -2,9 +2,15 @@
 
 gemspec
 
 gem 'rubysl', '~> 2.0', :platforms => :rbx
 
+gem 'coveralls', require: false
+
 group :metrics do
-  gem 'simplecov'
   gem 'flay'
+end
+
+group :development do
+  gem 'rake',  '~> 10.3.0'
+  gem 'rspec', '~> 3.0.0'
 end