Merge branch 'feature/simplecov-intergration' into develop

Gemfile

@@ -9,4 +9,5 @@ group :test do
   gem 'rspec'
   gem 'rubocop'
   gem 'coveralls', require: false
+  gem 'simplecov', require: false
 end

Gemfile.lock

@@ -100,3 +100,4 @@ DEPENDENCIES
   rake
   rspec
   rubocop
+  simplecov

spec/spec_helper.rb

@@ -16,7 +16,12 @@
 # limitations under the License.
 #
 require 'coveralls'
-Coveralls.wear!
+require 'simplecov'
+SimpleCov.formatter = SimpleCov::Formatter::MultiFormatter[
+  SimpleCov::Formatter::HTMLFormatter,
+  Coveralls::SimpleCov::Formatter
+]
+SimpleCov.start
 
 require 'github_changelog_generator'